diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 1f26654559..209e83443c 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -467,9 +467,6 @@ void avfilter_default_filter_samples(AVFilterLink *link, AVFilterBufferRef *samp
 /** default handler for config_props() for audio/video outputs */
 int avfilter_default_config_output_link(AVFilterLink *link);
 
-/** default handler for config_props() for audio/video inputs */
-int avfilter_default_config_input_link (AVFilterLink *link);
-
 /** default handler for get_video_buffer() for video inputs */
 AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link,
                                                      int perms, int w, int h);