diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index ef597ddf7f..23d40425f0 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -55,6 +55,7 @@ void avfilter_graph_free(AVFilterGraph **graph)
         return;
     for (; (*graph)->filter_count > 0; (*graph)->filter_count--)
         avfilter_free((*graph)->filters[(*graph)->filter_count - 1]);
+    av_freep(&(*graph)->sink_links);
     av_freep(&(*graph)->scale_sws_opts);
     av_freep(&(*graph)->filters);
     av_freep(graph);