diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 38fc26b7ea..8d7c82b2fe 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -796,6 +796,9 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
     if (!wc->mkv_mode) {
         s->samples = AV_RL32(buf);
         buf       += 4;
+        if (s->samples != wc->samples)
+            return AVERROR_INVALIDDATA;
+
         if (!s->samples) {
             *got_frame_ptr = 0;
             return 0;