diff --git a/libavcodec/utvideodec.c b/libavcodec/utvideodec.c
index ab390be0fa..694896d61f 100644
--- a/libavcodec/utvideodec.c
+++ b/libavcodec/utvideodec.c
@@ -985,7 +985,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
         return AVERROR_INVALIDDATA;
     }
 
-    c->buffer = av_calloc(avctx->width, c->pro?2:1);
+    c->buffer = av_calloc(avctx->width + 8, c->pro?2:1);
     if (!c->buffer)
         return AVERROR(ENOMEM);