diff --git a/cucul/Makefile.am b/cucul/Makefile.am
index 12fc129..5979d88 100644
--- a/cucul/Makefile.am
+++ b/cucul/Makefile.am
@@ -24,7 +24,7 @@ libcucul_la_SOURCES = \
 	conic.c \
 	triangle.c \
 	sprite.c \
-	bitmap.c \
+	dither.c \
 	export_irc.c \
 	export_ansi.c \
 	export_html.c \
diff --git a/cucul/bitmap.c b/cucul/dither.c
similarity index 99%
rename from cucul/bitmap.c
rename to cucul/dither.c
index ad7f008..9ed91c2 100644
--- a/cucul/bitmap.c
+++ b/cucul/dither.c
@@ -9,7 +9,7 @@
  *  http://sam.zoy.org/wtfpl/COPYING for more details.
  */
 
-/** \file bitmap.c
+/** \file dither.c
  *  \version \$Id$
  *  \author Sam Hocevar <sam@zoy.org>
  *  \brief Bitmap blitting