diff --git a/libavcodec/webp.c b/libavcodec/webp.c
index 62f35f7480b98a6662bf65a08074bce36937bcf7..4138e5414f8461a01f8355a9448d84cd355c9c14 100644
--- a/libavcodec/webp.c
+++ b/libavcodec/webp.c
@@ -1362,7 +1362,7 @@ static int webp_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
         return AVERROR_INVALIDDATA;
     }
 
-    while (bytestream2_get_bytes_left(&gb) > 0) {
+    while (bytestream2_get_bytes_left(&gb) > 8) {
         char chunk_str[5] = { 0 };
 
         chunk_type = bytestream2_get_le32(&gb);