diff --git a/public/app/core/components/Login/LoginForm.tsx b/public/app/core/components/Login/LoginForm.tsx
index c65573193c3..d5e5750b45c 100644
--- a/public/app/core/components/Login/LoginForm.tsx
+++ b/public/app/core/components/Login/LoginForm.tsx
@@ -103,7 +103,7 @@ export class LoginForm extends PureComponent<Props, State> {
               Log In
             </button>
           ) : (
-            <button type="submit" className="btn btn-large p-x-2 btn-inverse btn-loading">
+            <button type="submit" disabled className="btn btn-large p-x-2 btn-inverse btn-loading">
               Logging In<span>.</span>
               <span>.</span>
               <span>.</span>