diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 9ae0cb67e0..f1b925b3bb 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -46,8 +46,6 @@
 #include "libavutil/ffversion.h"
 const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
 
-static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
-
 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
 {
     av_unused char buf[16];