diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index a36e96087ef0c6c863c94edb5013d6cfd6087591..d568cbbf05701ec5df4e3cf382c416ad697cfb0b 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -147,7 +147,7 @@ int ff_set_sar(AVCodecContext *avctx, AVRational sar)
     int ret = av_image_check_sar(avctx->width, avctx->height, sar);
 
     if (ret < 0) {
-        av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
+        av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %d/%d\n",
                sar.num, sar.den);
         avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
         return ret;