diff --git a/module/zstd/lib/common/bitstream.h b/module/zstd/lib/common/bitstream.h
index 37b99c01e..11b660adb 100644
--- a/module/zstd/lib/common/bitstream.h
+++ b/module/zstd/lib/common/bitstream.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * bitstream
  * Part of FSE library
diff --git a/module/zstd/lib/common/compiler.h b/module/zstd/lib/common/compiler.h
index 95e948352..d0f588e2e 100644
--- a/module/zstd/lib/common/compiler.h
+++ b/module/zstd/lib/common/compiler.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/cpu.h b/module/zstd/lib/common/cpu.h
index 6e8a974f6..8e02d30bf 100644
--- a/module/zstd/lib/common/cpu.h
+++ b/module/zstd/lib/common/cpu.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2018-2020, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/debug.h b/module/zstd/lib/common/debug.h
index ac6224888..1c49d998c 100644
--- a/module/zstd/lib/common/debug.h
+++ b/module/zstd/lib/common/debug.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * debug
  * Part of FSE library
diff --git a/module/zstd/lib/common/entropy_common.c b/module/zstd/lib/common/entropy_common.c
index 9d3e4e8e3..75877965f 100644
--- a/module/zstd/lib/common/entropy_common.c
+++ b/module/zstd/lib/common/entropy_common.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * Common functions of New Generation Entropy library
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
diff --git a/module/zstd/lib/common/error_private.c b/module/zstd/lib/common/error_private.c
index cd437529c..63fa2866c 100644
--- a/module/zstd/lib/common/error_private.c
+++ b/module/zstd/lib/common/error_private.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/error_private.h b/module/zstd/lib/common/error_private.h
index 982cf8e9f..85b5aafc5 100644
--- a/module/zstd/lib/common/error_private.h
+++ b/module/zstd/lib/common/error_private.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/fse.h b/module/zstd/lib/common/fse.h
index ff54e70ea..c9e0427c2 100644
--- a/module/zstd/lib/common/fse.h
+++ b/module/zstd/lib/common/fse.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * FSE : Finite State Entropy codec
  * Public Prototypes declaration
diff --git a/module/zstd/lib/common/fse_decompress.c b/module/zstd/lib/common/fse_decompress.c
index 6b3205c63..6932bdff5 100644
--- a/module/zstd/lib/common/fse_decompress.c
+++ b/module/zstd/lib/common/fse_decompress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * FSE : Finite State Entropy decoder
  * Copyright (c) 2013-2020, Yann Collet, Facebook, Inc.
diff --git a/module/zstd/lib/common/huf.h b/module/zstd/lib/common/huf.h
index ef432685d..d1926e48b 100644
--- a/module/zstd/lib/common/huf.h
+++ b/module/zstd/lib/common/huf.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * huff0 huffman codec,
  * part of Finite State Entropy library
diff --git a/module/zstd/lib/common/mem.h b/module/zstd/lib/common/mem.h
index 7fbb2e982..8110a287d 100644
--- a/module/zstd/lib/common/mem.h
+++ b/module/zstd/lib/common/mem.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/pool.c b/module/zstd/lib/common/pool.c
index aa4b4de0d..e804c01ed 100644
--- a/module/zstd/lib/common/pool.c
+++ b/module/zstd/lib/common/pool.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/pool.h b/module/zstd/lib/common/pool.h
index 259bafc97..7f6f427f5 100644
--- a/module/zstd/lib/common/pool.h
+++ b/module/zstd/lib/common/pool.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/xxhash.c b/module/zstd/lib/common/xxhash.c
index 597de18fc..d3d2e57ad 100644
--- a/module/zstd/lib/common/xxhash.c
+++ b/module/zstd/lib/common/xxhash.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  *  xxHash - Fast Hash algorithm
  *  Copyright (c) 2012-2020, Yann Collet, Facebook, Inc.
diff --git a/module/zstd/lib/common/xxhash.h b/module/zstd/lib/common/xxhash.h
index 4207eba83..ba48c8300 100644
--- a/module/zstd/lib/common/xxhash.h
+++ b/module/zstd/lib/common/xxhash.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * xxHash - Extremely Fast Hash algorithm
  * Header File
diff --git a/module/zstd/lib/common/zstd_common.c b/module/zstd/lib/common/zstd_common.c
index 935670b1d..d27e54611 100644
--- a/module/zstd/lib/common/zstd_common.c
+++ b/module/zstd/lib/common/zstd_common.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/zstd_errors.h b/module/zstd/lib/common/zstd_errors.h
index 998398e7e..4ff16dad1 100644
--- a/module/zstd/lib/common/zstd_errors.h
+++ b/module/zstd/lib/common/zstd_errors.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/common/zstd_internal.h b/module/zstd/lib/common/zstd_internal.h
index 4a86d186a..6b1fc44cf 100644
--- a/module/zstd/lib/common/zstd_internal.h
+++ b/module/zstd/lib/common/zstd_internal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/fse_compress.c b/module/zstd/lib/compress/fse_compress.c
index e27414ccb..cde33cf69 100644
--- a/module/zstd/lib/compress/fse_compress.c
+++ b/module/zstd/lib/compress/fse_compress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * FSE : Finite State Entropy encoder
  * Copyright (c) 2013-2020, Yann Collet, Facebook, Inc.
diff --git a/module/zstd/lib/compress/hist.c b/module/zstd/lib/compress/hist.c
index 61e08c796..1bda6b7d3 100644
--- a/module/zstd/lib/compress/hist.c
+++ b/module/zstd/lib/compress/hist.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * hist : Histogram functions
  * part of Finite State Entropy project
diff --git a/module/zstd/lib/compress/hist.h b/module/zstd/lib/compress/hist.h
index 77e3ec4fb..a63179e94 100644
--- a/module/zstd/lib/compress/hist.h
+++ b/module/zstd/lib/compress/hist.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * hist : Histogram functions
  * part of Finite State Entropy project
diff --git a/module/zstd/lib/compress/huf_compress.c b/module/zstd/lib/compress/huf_compress.c
index 546879868..bdb9eccc7 100644
--- a/module/zstd/lib/compress/huf_compress.c
+++ b/module/zstd/lib/compress/huf_compress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * Huffman encoder, part of New Generation Entropy library
  * Copyright (c) 2013-2020, Yann Collet, Facebook, Inc.
diff --git a/module/zstd/lib/compress/zstd_compress.c b/module/zstd/lib/compress/zstd_compress.c
index 3f963b1cf..62dcac9f3 100644
--- a/module/zstd/lib/compress/zstd_compress.c
+++ b/module/zstd/lib/compress/zstd_compress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_internal.h b/module/zstd/lib/compress/zstd_compress_internal.h
index db73f6ce2..325f1749e 100644
--- a/module/zstd/lib/compress/zstd_compress_internal.h
+++ b/module/zstd/lib/compress/zstd_compress_internal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_literals.c b/module/zstd/lib/compress/zstd_compress_literals.c
index 17e7168d8..d3741d47f 100644
--- a/module/zstd/lib/compress/zstd_compress_literals.c
+++ b/module/zstd/lib/compress/zstd_compress_literals.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_literals.h b/module/zstd/lib/compress/zstd_compress_literals.h
index 8b0870574..53e49dc8f 100644
--- a/module/zstd/lib/compress/zstd_compress_literals.h
+++ b/module/zstd/lib/compress/zstd_compress_literals.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_sequences.c b/module/zstd/lib/compress/zstd_compress_sequences.c
index f9f8097c8..495d8703a 100644
--- a/module/zstd/lib/compress/zstd_compress_sequences.c
+++ b/module/zstd/lib/compress/zstd_compress_sequences.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_sequences.h b/module/zstd/lib/compress/zstd_compress_sequences.h
index 68c6f9a5a..ecd045725 100644
--- a/module/zstd/lib/compress/zstd_compress_sequences.h
+++ b/module/zstd/lib/compress/zstd_compress_sequences.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_superblock.c b/module/zstd/lib/compress/zstd_compress_superblock.c
index 77d05d394..a53454f1d 100644
--- a/module/zstd/lib/compress/zstd_compress_superblock.c
+++ b/module/zstd/lib/compress/zstd_compress_superblock.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_superblock.h b/module/zstd/lib/compress/zstd_compress_superblock.h
index 07f4cb1dc..5dfcb79c8 100644
--- a/module/zstd/lib/compress/zstd_compress_superblock.h
+++ b/module/zstd/lib/compress/zstd_compress_superblock.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_cwksp.h b/module/zstd/lib/compress/zstd_cwksp.h
index a25c9263b..4f1dcff56 100644
--- a/module/zstd/lib/compress/zstd_cwksp.h
+++ b/module/zstd/lib/compress/zstd_cwksp.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_double_fast.c b/module/zstd/lib/compress/zstd_double_fast.c
index 4a95c01a0..f1c2e95a0 100644
--- a/module/zstd/lib/compress/zstd_double_fast.c
+++ b/module/zstd/lib/compress/zstd_double_fast.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_double_fast.h b/module/zstd/lib/compress/zstd_double_fast.h
index 14d944d69..da0dc59a9 100644
--- a/module/zstd/lib/compress/zstd_double_fast.h
+++ b/module/zstd/lib/compress/zstd_double_fast.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_fast.c b/module/zstd/lib/compress/zstd_fast.c
index 17894b854..3dbf323c9 100644
--- a/module/zstd/lib/compress/zstd_fast.c
+++ b/module/zstd/lib/compress/zstd_fast.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_fast.h b/module/zstd/lib/compress/zstd_fast.h
index cf6aaa8e6..e26f43b5a 100644
--- a/module/zstd/lib/compress/zstd_fast.h
+++ b/module/zstd/lib/compress/zstd_fast.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_lazy.c b/module/zstd/lib/compress/zstd_lazy.c
index 22d80597e..50b7c946a 100644
--- a/module/zstd/lib/compress/zstd_lazy.c
+++ b/module/zstd/lib/compress/zstd_lazy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_lazy.h b/module/zstd/lib/compress/zstd_lazy.h
index 581936f03..071be3d5f 100644
--- a/module/zstd/lib/compress/zstd_lazy.h
+++ b/module/zstd/lib/compress/zstd_lazy.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_ldm.c b/module/zstd/lib/compress/zstd_ldm.c
index 8c4794835..26618d4e9 100644
--- a/module/zstd/lib/compress/zstd_ldm.c
+++ b/module/zstd/lib/compress/zstd_ldm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_ldm.h b/module/zstd/lib/compress/zstd_ldm.h
index 229ea05a9..2a7d15cf7 100644
--- a/module/zstd/lib/compress/zstd_ldm.h
+++ b/module/zstd/lib/compress/zstd_ldm.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_opt.c b/module/zstd/lib/compress/zstd_opt.c
index 36fff050c..a70162a54 100644
--- a/module/zstd/lib/compress/zstd_opt.c
+++ b/module/zstd/lib/compress/zstd_opt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Przemyslaw Skibinski, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_opt.h b/module/zstd/lib/compress/zstd_opt.h
index 9aba8a901..231f4d523 100644
--- a/module/zstd/lib/compress/zstd_opt.h
+++ b/module/zstd/lib/compress/zstd_opt.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/huf_decompress.c b/module/zstd/lib/decompress/huf_decompress.c
index 68293a130..0a4c94e93 100644
--- a/module/zstd/lib/decompress/huf_decompress.c
+++ b/module/zstd/lib/decompress/huf_decompress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * huff0 huffman decoder,
  * part of Finite State Entropy library
diff --git a/module/zstd/lib/decompress/zstd_ddict.c b/module/zstd/lib/decompress/zstd_ddict.c
index c8cb8ecc9..7a91678b3 100644
--- a/module/zstd/lib/decompress/zstd_ddict.c
+++ b/module/zstd/lib/decompress/zstd_ddict.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_ddict.h b/module/zstd/lib/decompress/zstd_ddict.h
index af307efd3..fa3ec8003 100644
--- a/module/zstd/lib/decompress/zstd_ddict.h
+++ b/module/zstd/lib/decompress/zstd_ddict.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_decompress.c b/module/zstd/lib/decompress/zstd_decompress.c
index be5c7cfc3..4656a7234 100644
--- a/module/zstd/lib/decompress/zstd_decompress.c
+++ b/module/zstd/lib/decompress/zstd_decompress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_decompress_block.c b/module/zstd/lib/decompress/zstd_decompress_block.c
index 6f09e61b7..88567a810 100644
--- a/module/zstd/lib/decompress/zstd_decompress_block.c
+++ b/module/zstd/lib/decompress/zstd_decompress_block.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_decompress_block.h b/module/zstd/lib/decompress/zstd_decompress_block.h
index bf39b7350..7d0f26d40 100644
--- a/module/zstd/lib/decompress/zstd_decompress_block.h
+++ b/module/zstd/lib/decompress/zstd_decompress_block.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_decompress_internal.h b/module/zstd/lib/decompress/zstd_decompress_internal.h
index 9ad96c554..37389fcbb 100644
--- a/module/zstd/lib/decompress/zstd_decompress_internal.h
+++ b/module/zstd/lib/decompress/zstd_decompress_internal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
diff --git a/module/zstd/lib/zstd.h b/module/zstd/lib/zstd.h
index 8c6fc6ae9..be955c259 100644
--- a/module/zstd/lib/zstd.h
+++ b/module/zstd/lib/zstd.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.