1 files changed, 3 insertions, 0 deletions
diff --git a/src/util.h b/src/util.h
index a58585e..e6f9bcf 100644
--- a/src/util.h
+++ b/src/util.h
@@ -3,5 +3,8 @@
 
 void
 pgm_save(unsigned char *buf, int wrap, int xsize, int ysize, char *filename);
+void
+frame_mix_pgm_save(struct video_frame *frame_a, struct video_frame *frame_b,
+        char *filename);
 
 #endif /* _UTIL_H_ */