diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 72099806a6..f4a2872609 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -608,6 +608,7 @@ static int avi_read_header(AVFormatContext *s)
                 if (s->streams[0]->info)
                     av_freep(&s->streams[0]->info->duration_error);
                 av_freep(&s->streams[0]->info);
+                av_freep(&s->streams[0]->internal);
                 av_freep(&s->streams[0]);
                 s->nb_streams = 0;
                 if (CONFIG_DV_DEMUXER) {