diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c
index bc5288734e..9e48531fc8 100644
--- a/libavformat/wavdec.c
+++ b/libavformat/wavdec.c
@@ -288,7 +288,7 @@ static int wav_read_header(AVFormatContext *s)
             break;
         case MKTAG('L', 'I', 'S', 'T'):
             list_type = avio_rl32(pb);
-            if (size <= 4) {
+            if (size < 4) {
                 av_log(s, AV_LOG_ERROR, "too short LIST");
                 return AVERROR_INVALIDDATA;
             }