diff --git a/libavformat/mpsubdec.c b/libavformat/mpsubdec.c
index 3d8dcb35c2..82c73457ea 100644
--- a/libavformat/mpsubdec.c
+++ b/libavformat/mpsubdec.c
@@ -163,6 +163,9 @@ static int mpsub_read_header(AVFormatContext *s)
     ff_subtitles_queue_finalize(s, &mpsub->q);
 
 end:
+    if (res < 0)
+        ff_subtitles_queue_clean(&mpsub->q);
+
     av_bprint_finalize(&buf, NULL);
     return res;
 }