diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 216a9f1119..b60a56deab 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -316,6 +316,7 @@ static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
     case MaterialPackage:
         av_freep(&((MXFPackage *)*ctx)->tracks_refs);
         av_freep(&((MXFPackage *)*ctx)->name);
+        av_freep(&((MXFPackage *)*ctx)->comment_refs);
         break;
     case TaggedValue:
         av_freep(&((MXFTaggedValue *)*ctx)->name);