diff --git a/core/modules/startup/windows.js b/core/modules/startup/windows.js
index 591f5d5fa..8dd5692a9 100644
--- a/core/modules/startup/windows.js
+++ b/core/modules/startup/windows.js
@@ -83,6 +83,10 @@ exports.startup = function() {
 			name: "keydown",
 			handlerObject: $tw.keyboardManager,
 			handlerMethod: "handleKeydownEvent"
+		},{
+			name: "click",
+			handlerObject: $tw.popup,
+			handlerMethod: "handleEvent"
 		}]);
 		srcWindow.haveInitialisedWindow = true;
 	});