diff --git a/src/Makefile.am b/src/Makefile.am
index 96df1c1..98e03fc 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -25,7 +25,7 @@ libImlib2_la_SOURCES = scale.c image.c blend.c file.c rgbadraw.c api.c \
 
 EXTRA_libImlib2_la_SOURCES = rend.c ximage.c rgba.c color.c grab.c draw.c \
 			     context.c color.h context.h draw.h grab.h rend.h \
-			     rgba.h ximage.h
+			     rgba.h ximage.h $(MMX_SRCS)
 libImlib2_la_LDFLAGS      = -version-info 1:0:0
 
 if HAVE_MMX