diff --git a/web/src/auth/AuthCallback.js b/web/src/auth/AuthCallback.js
index 06e4e9811..2359c3afb 100644
--- a/web/src/auth/AuthCallback.js
+++ b/web/src/auth/AuthCallback.js
@@ -106,7 +106,7 @@ class AuthCallback extends React.Component {
       method: method,
     };
     const oAuthParams = Util.getOAuthGetParameters(innerParams);
-    const concatChar = oAuthParams?.redirectUri?.indexOf('?') === -1 ? '?' : '&';
+    const concatChar = oAuthParams?.redirectUri?.includes('?') ? '&' : '?';
     AuthBackend.login(body, oAuthParams)
       .then((res) => {
         if (res.status === 'ok') {
diff --git a/web/src/auth/LoginPage.js b/web/src/auth/LoginPage.js
index cf9a9eabc..2f914041f 100644
--- a/web/src/auth/LoginPage.js
+++ b/web/src/auth/LoginPage.js
@@ -138,7 +138,7 @@ class LoginPage extends React.Component {
             Setting.goToLink(link);
           } else if (responseType === "code") {
             const code = res.data;
-            const concatChar = oAuthParams?.redirectUri?.indexOf('?') === -1 ? '?' : '&';
+            const concatChar = oAuthParams?.redirectUri?.includes('?') ? '&' : '?';
 
             if (Setting.hasPromptPage(application)) {
               AuthBackend.getAccount("")