diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index 0386f5c..bffbe8a 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -172,8 +172,8 @@ static int write_option_max_new_filters(const struct option *opt,
 		const char *s;
 		*to = strtol(arg, (char **)&s, 10);
 		if (*s)
-			return error(_("%s expects a numerical value"),
-				     optname(opt, opt->flags));
+			return error(_("option `%s' expects a numerical value"),
+				     "max-new-filters");
 	}
 	return 0;
 }