diff --git a/libavcodec/libopusenc.c b/libavcodec/libopusenc.c
index 6bb48628ab..785460972d 100644
--- a/libavcodec/libopusenc.c
+++ b/libavcodec/libopusenc.c
@@ -277,7 +277,7 @@ static av_cold int libopus_encode_init(AVCodecContext *avctx)
     }
     avctx->extradata_size = header_size;
 
-    opus->samples = av_mallocz(frame_size * avctx->channels *
+    opus->samples = av_mallocz_array(frame_size, avctx->channels *
                                av_get_bytes_per_sample(avctx->sample_fmt));
     if (!opus->samples) {
         av_log(avctx, AV_LOG_ERROR, "Failed to allocate samples buffer.\n");