diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index f47ffebc06..2e44dce2c9 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -278,6 +278,7 @@ void avfilter_init(void)
     avfilter_register(&avfilter_vf_graph);
     avfilter_register(&avfilter_vf_graphdesc);
     avfilter_register(&avfilter_vf_graphfile);
+    avfilter_register(&avfilter_vf_hflip);
     avfilter_register(&avfilter_vf_negate);
     avfilter_register(&avfilter_vf_overlay);
     avfilter_register(&avfilter_vf_passthrough);