diff --git a/libavcodec/dxtory.c b/libavcodec/dxtory.c
index 8a326b7f3b..fc1936985d 100644
--- a/libavcodec/dxtory.c
+++ b/libavcodec/dxtory.c
@@ -65,7 +65,7 @@ static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
     uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
     int ret;
 
-    if (src_size < avctx->width * avctx->height * 9LL / 8) {
+    if (src_size < FFALIGN(avctx->width, 4) * FFALIGN(avctx->height, 4) * 9LL / 8) {
         av_log(avctx, AV_LOG_ERROR, "packet too small\n");
         return AVERROR_INVALIDDATA;
     }