diff --git a/libavformat/westwood_audenc.c b/libavformat/westwood_audenc.c
index 4ec905b088..490f2ee260 100644
--- a/libavformat/westwood_audenc.c
+++ b/libavformat/westwood_audenc.c
@@ -103,7 +103,8 @@ static int wsaud_write_packet(AVFormatContext *ctx, AVPacket *pkt)
     AVIOContext  *pb = ctx->pb;
     AUDMuxContext *a = ctx->priv_data;
 
-    av_assert1(pkt->size < UINT16_MAX && (pkt->size * 4) < UINT16_MAX);
+    if (pkt->size > UINT16_MAX / 4)
+        return AVERROR_INVALIDDATA;
     /* Assumes ADPCM since this muxer doesn't support SND1 or PCM format. */
     avio_wl16(pb, pkt->size);
     avio_wl16(pb, pkt->size * 4);