diff --git a/libavfilter/vf_normalize.c b/libavfilter/vf_normalize.c
index 5c1fe98c60..b95bb4d100 100644
--- a/libavfilter/vf_normalize.c
+++ b/libavfilter/vf_normalize.c
@@ -383,4 +383,5 @@ AVFilter ff_vf_normalize = {
     .query_formats = query_formats,
     .inputs        = inputs,
     .outputs       = outputs,
+    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
 };