diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 863945a38f..911cdd6226 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -488,9 +488,6 @@ void avfilter_end_frame(AVFilterLink *link);
  */
 void avfilter_draw_slice(AVFilterLink *link, int y, int h);
 
-/** Initialize the filter system.  Registers all builtin filters */
-void avfilter_init(void);
-
 /** Initialize the filter system.  Registers all builtin filters */
 void avfilter_register_all(void);