diff --git a/libavfilter/vf_tonemap.c b/libavfilter/vf_tonemap.c
index b62532946b..98a2c4bd23 100644
--- a/libavfilter/vf_tonemap.c
+++ b/libavfilter/vf_tonemap.c
@@ -265,6 +265,8 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
 
     av_frame_free(&in);
 
+    ff_update_hdr_metadata(out, peak);
+
     return ff_filter_frame(outlink, out);
 }