diff --git a/ui/src/app/components/timewindow.directive.js b/ui/src/app/components/timewindow.directive.js
index 70342abd11..0d06de8679 100644
--- a/ui/src/app/components/timewindow.directive.js
+++ b/ui/src/app/components/timewindow.directive.js
@@ -255,7 +255,7 @@ function Timewindow($compile, $templateCache, $filter, $mdPanel, $document, $mdM
         scope: {
             asButton: '=asButton',
             disabled:'=ngDisabled',
-            isEdit: '=?'
+            isEdit: '&?'
 
         },
         link: linker