diff --git a/doc/articles/wiki/final-noclosure.go b/doc/articles/wiki/final-noclosure.go
index b4ce255742..e7a5a34519 100644
--- a/doc/articles/wiki/final-noclosure.go
+++ b/doc/articles/wiki/final-noclosure.go
@@ -90,7 +90,7 @@ func getTitle(w http.ResponseWriter, r *http.Request) (string, error) {
 	m := validPath.FindStringSubmatch(r.URL.Path)
 	if m == nil {
 		http.NotFound(w, r)
-		return "", errors.New("Invalid Page Title")
+		return "", errors.New("invalid Page Title")
 	}
 	return m[2], nil // The title is the second subexpression.
 }