diff --git a/mozilla/calendar/lightning/content/messenger-overlay-toolbar.xul b/mozilla/calendar/lightning/content/messenger-overlay-toolbar.xul
index e4ccc0699ea..e7ecf4dd55d 100644
--- a/mozilla/calendar/lightning/content/messenger-overlay-toolbar.xul
+++ b/mozilla/calendar/lightning/content/messenger-overlay-toolbar.xul
@@ -14,6 +14,7 @@
   <toolbarpalette id="MailToolbarPalette">
 
     <toolbarbutton id="calendar-new-event-button" class="cal-toolbarbutton-1" label="New Event" tooltiptext="New Event" oncommand="createEventWithDialog()"/>
+    <toolbarbutton id="calendar-new-task-button" class="cal-toolbarbutton-1" label="New Todo" tooltiptext="New Todo" oncommand="createTodoWithDialog()"/>
     <toolbarbutton id="calendar-week-view-button" class="cal-toolbarbutton-1" label="Week View" tooltiptext="Month View" oncommand="switchView('week')"/>
     <toolbarbutton id="calendar-month-view-button" class="cal-toolbarbutton-1" label="Month View" tooltiptext="Month View" oncommand="switchView('month')"/>
     <toolbarbutton id="calendar-day-view-button" class="cal-toolbarbutton-1" label="Day View" tooltiptext="Day View" oncommand="switchView('day')"/>