diff --git a/libavformat/subviewerdec.c b/libavformat/subviewerdec.c
index 06b827b70f..25fe7ac9a6 100644
--- a/libavformat/subviewerdec.c
+++ b/libavformat/subviewerdec.c
@@ -162,6 +162,8 @@ static int subviewer_read_header(AVFormatContext *s)
     ff_subtitles_queue_finalize(s, &subviewer->q);
 
 end:
+    if (res < 0)
+        ff_subtitles_queue_clean(&subviewer->q);
     av_bprint_finalize(&header, NULL);
     return res;
 }