diff --git a/libavfilter/vf_ssim.c b/libavfilter/vf_ssim.c
index 97bffcf70c..54e28d43bd 100644
--- a/libavfilter/vf_ssim.c
+++ b/libavfilter/vf_ssim.c
@@ -414,10 +414,8 @@ static av_cold int init(AVFilterContext *ctx)
             s->stats_file = avpriv_fopen_utf8(s->stats_file_str, "w");
             if (!s->stats_file) {
                 int err = AVERROR(errno);
-                char buf[128];
-                av_strerror(err, buf, sizeof(buf));
                 av_log(ctx, AV_LOG_ERROR, "Could not open stats file %s: %s\n",
-                       s->stats_file_str, buf);
+                       s->stats_file_str, av_err2str(err));
                 return err;
             }
         }