diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 861a57d400..d05d4eaf01 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -156,6 +156,8 @@ void avfilter_link_free(AVFilterLink **link)
     if ((*link)->pool)
         ff_free_pool((*link)->pool);
 
+    avfilter_unref_bufferp(&(*link)->partial_buf);
+
     av_freep(link);
 }