diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 4ac2f1a5c1..a713099ae9 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -448,6 +448,9 @@ void ff_mpeg_unref_picture(MpegEncContext *s, Picture *pic)
 
     av_buffer_unref(&pic->hwaccel_priv_buf);
 
+    if (pic->needs_realloc)
+        free_picture_tables(pic);
+
     memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
 }