diff --git a/src/components/Login/LoginTab.js b/src/components/Login/LoginTab.js
index 6b7d9758f487c64aa02d470abfa2b3ad17e2d7eb..750bfe7c24df5ec77e846475cef78aca787e0aff 100644
--- a/src/components/Login/LoginTab.js
+++ b/src/components/Login/LoginTab.js
@@ -6,7 +6,7 @@ const { TabPane } = Tabs;
 
 const generateId = (() => {
   let i = 0;
-  return (prefix: string = '') => {
+  return (prefix = '') => {
     i += 1;
     return `${prefix}${i}`;
   };