diff --git a/www/common/cryptpad-common.js b/www/common/cryptpad-common.js
index 5600af0c8..d11c4eb1b 100644
--- a/www/common/cryptpad-common.js
+++ b/www/common/cryptpad-common.js
@@ -1058,7 +1058,7 @@ define([
         timeout = true;
         common.onNetworkDisconnect.fire();
         // FIXME: no UI in outer...
-        alert("Timeout error, please reload this tab");
+        window.alert("Timeout error, please reload this tab");
     };
 
     var queries = {