diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
index 9b4203bbb5..db9012d5ec 100644
--- a/libavformat/img2dec.c
+++ b/libavformat/img2dec.c
@@ -514,6 +514,7 @@ int ff_img_read_packet(AVFormatContext *s1, AVPacket *pkt)
         }
         goto fail;
     } else {
+        memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
         s->img_count++;
         s->img_number++;
         s->pts++;