diff --git a/debian/changelog b/debian/changelog
index 8dd395c6..e13f908e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -8,6 +8,7 @@ llvm-toolchain-snapshot (1:17~++20230603110125+d072d110227d-1~exp1) experimental
   * Try to pass MAKE_C_COMPILER_LAUNCHER and CMAKE_CXX_COMPILER_LAUNCHER
     in CLANG_BOOTSTRAP_PASSTHROUGH for sccache in stage2
   * Disable python3-lldb-17 for buster (it has been this way for a while)
+  * Try to workaround issue 63613
 
  -- Sylvestre Ledru <sylvestre@debian.org>  Fri, 09 Jun 2023 13:25:01 +0200
 
diff --git a/debian/patches/fix-issue-63613.diff b/debian/patches/fix-issue-63613.diff
new file mode 100644
index 00000000..a1305b44
--- /dev/null
+++ b/debian/patches/fix-issue-63613.diff
@@ -0,0 +1,12 @@
+Index: llvm-toolchain-snapshot_17~++20230630093049+0446bfcc5ca2/libcxx/src/filesystem/posix_compat.h
+===================================================================
+--- llvm-toolchain-snapshot_17~++20230630093049+0446bfcc5ca2.orig/libcxx/src/filesystem/posix_compat.h
++++ llvm-toolchain-snapshot_17~++20230630093049+0446bfcc5ca2/libcxx/src/filesystem/posix_compat.h
+@@ -39,6 +39,7 @@
+ # include <fcntl.h>
+ # include <unistd.h>
+ # include <sys/stat.h>
++# include <sys/cdefs.h>
+ # include <sys/statvfs.h>
+ # include <sys/time.h>
+ #endif
diff --git a/debian/patches/series b/debian/patches/series
index bb9861a8..080a2b99 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -149,3 +149,4 @@ force-sse2-compiler-rt.diff
 bolt-disable-emit-relocs.patch
 link-grpc.diff
 
+fix-issue-63613.diff