diff --git a/cairo_canvas.c b/cairo_canvas.c
index f198878..a5d4146 100644
--- a/cairo_canvas.c
+++ b/cairo_canvas.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/cairo_canvas.h b/cairo_canvas.h
index 72abcb2..bf6ff90 100644
--- a/cairo_canvas.h
+++ b/cairo_canvas.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/canvas_base.c b/canvas_base.c
index de467c7..356ef9d 100644
--- a/canvas_base.c
+++ b/canvas_base.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/canvas_base.h b/canvas_base.h
index ad73bb9..15cf869 100644
--- a/canvas_base.h
+++ b/canvas_base.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/gdi_canvas.c b/gdi_canvas.c
index df5ae64..9e29cb8 100644
--- a/gdi_canvas.c
+++ b/gdi_canvas.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/gdi_canvas.h b/gdi_canvas.h
index 8ba3f20..606e71e 100644
--- a/gdi_canvas.h
+++ b/gdi_canvas.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/gl_canvas.c b/gl_canvas.c
index fd1a2c9..124bcfe 100644
--- a/gl_canvas.c
+++ b/gl_canvas.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/gl_canvas.h b/gl_canvas.h
index 442c9f4..74c8913 100644
--- a/gl_canvas.h
+++ b/gl_canvas.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/gl_utils.h b/gl_utils.h
index 4126677..eeb9f02 100644
--- a/gl_utils.h
+++ b/gl_utils.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/glc.c b/glc.c
index 5300ebd..090dc03 100644
--- a/glc.c
+++ b/glc.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/glc.h b/glc.h
index 6213c37..a6b8579 100644
--- a/glc.h
+++ b/glc.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/lookup3.c b/lookup3.c
index f23461a..57274db 100644
--- a/lookup3.c
+++ b/lookup3.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
 -------------------------------------------------------------------------------
 lookup3.c, by Bob Jenkins, May 2006, Public Domain.
diff --git a/lookup3.h b/lookup3.h
index 00bc4eb..a0d6ec8 100644
--- a/lookup3.h
+++ b/lookup3.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/lz.c b/lz.c
index e0e112e..f99aa34 100644
--- a/lz.c
+++ b/lz.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
 
  Copyright 2009 Red Hat, Inc. and/or its affiliates.
diff --git a/lz.h b/lz.h
index 0444dc8..3ad6caa 100644
--- a/lz.h
+++ b/lz.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
         dictionary compression for images based on fastlz (http://www.fastlz.org/)
         (Distributed under MIT license).
diff --git a/lz_common.h b/lz_common.h
index 75c32e2..d5019fd 100644
--- a/lz_common.h
+++ b/lz_common.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/lz_compress_tmpl.c b/lz_compress_tmpl.c
index be1b941..b74a256 100644
--- a/lz_compress_tmpl.c
+++ b/lz_compress_tmpl.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
 
  Copyright 2009 Red Hat, Inc. and/or its affiliates.
diff --git a/lz_config.h b/lz_config.h
index 748d79d..4db6dc3 100644
--- a/lz_config.h
+++ b/lz_config.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/lz_decompress_tmpl.c b/lz_decompress_tmpl.c
index 36502c6..2fbcfba 100644
--- a/lz_decompress_tmpl.c
+++ b/lz_decompress_tmpl.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
 
  Copyright 2009 Red Hat, Inc. and/or its affiliates.
diff --git a/mutex.h b/mutex.h
index 373d54e..2cf29e9 100644
--- a/mutex.h
+++ b/mutex.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/ogl_ctx.c b/ogl_ctx.c
index 6b17511..df58a81 100644
--- a/ogl_ctx.c
+++ b/ogl_ctx.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/ogl_ctx.h b/ogl_ctx.h
index 85a551a..c460b9a 100644
--- a/ogl_ctx.h
+++ b/ogl_ctx.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/quic.c b/quic.c
index 7568f9e..507c450 100644
--- a/quic.c
+++ b/quic.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/quic.h b/quic.h
index 8824db7..e8057e4 100644
--- a/quic.h
+++ b/quic.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/quic_config.h b/quic_config.h
index c9eb8fa..424a34d 100644
--- a/quic_config.h
+++ b/quic_config.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/quic_family_tmpl.c b/quic_family_tmpl.c
index 58ae693..3c45af3 100644
--- a/quic_family_tmpl.c
+++ b/quic_family_tmpl.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/quic_rgb_tmpl.c b/quic_rgb_tmpl.c
index 2007df6..af3cda9 100644
--- a/quic_rgb_tmpl.c
+++ b/quic_rgb_tmpl.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/quic_tmpl.c b/quic_tmpl.c
index 5a0a8e5..8a600d3 100644
--- a/quic_tmpl.c
+++ b/quic_tmpl.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/rect.h b/rect.h
index 61de99c..43e7f21 100644
--- a/rect.h
+++ b/rect.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/region.h b/region.h
index e685bfb..f981ef3 100644
--- a/region.h
+++ b/region.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/ring.h b/ring.h
index 4c17713..76c28a8 100644
--- a/ring.h
+++ b/ring.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/rop3.c b/rop3.c
index 6d2efa2..64baba8 100644
--- a/rop3.c
+++ b/rop3.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.
 
diff --git a/rop3.h b/rop3.h
index 3a24ece..32a6203 100644
--- a/rop3.h
+++ b/rop3.h
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
 /*
    Copyright (C) 2009 Red Hat, Inc.