diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 2d8c097a5e3a84052740946cda79a8196b930c8b..65bceb9115bf0f0a512ec4eac6db59d3c40d5b1f 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -301,6 +301,7 @@ void avfilter_init(void)
     avfilter_register(&avfilter_vf_negate);
     avfilter_register(&avfilter_vf_noformat);
     avfilter_register(&avfilter_vf_overlay);
+    avfilter_register(&avfilter_vf_rot90);
     avfilter_register(&avfilter_vf_scale);
     avfilter_register(&avfilter_vf_slicify);
     avfilter_register(&avfilter_vf_split);