diff --git a/ui/src/utils.ts b/ui/src/utils.ts
index fa7f1297..55a0777a 100644
--- a/ui/src/utils.ts
+++ b/ui/src/utils.ts
@@ -350,7 +350,7 @@ export function debounce(
   };
 }
 
-export function getLanguage(override: string): string {
+export function getLanguage(override?: string): string {
   let user = UserService.Instance.user;
   let lang = override || (user && user.lang ? user.lang : 'browser');