diff --git a/static/webui/script.js b/static/webui/script.js
index e4d0ed92..e8dce874 100644
--- a/static/webui/script.js
+++ b/static/webui/script.js
@@ -13,6 +13,7 @@ function doLogin() {
 }
 
 function loginFromLocalStorage() {
+    const isRegister = registerSubmit;
     doLoginRequest(
         data => {
             if (single.getCurrentPath() == "/webui/") {
@@ -28,7 +29,7 @@ function loginFromLocalStorage() {
         },
         () => {
             logout();
-            alert("Login failed");
+            alert(isRegister ? "Registration failed. Account already exists?" : "Login failed");
         }
     );
 }