diff --git a/libavformat/webvttdec.c b/libavformat/webvttdec.c
index 0aeb8a63f4..8e9c562683 100644
--- a/libavformat/webvttdec.c
+++ b/libavformat/webvttdec.c
@@ -165,6 +165,8 @@ static int webvtt_read_header(AVFormatContext *s)
     ff_subtitles_queue_finalize(s, &webvtt->q);
 
 end:
+    if (res < 0)
+        ff_subtitles_queue_clean(&webvtt->q);
     av_bprint_finalize(&cue,    NULL);
     av_bprint_finalize(&header, NULL);
     return res;