diff --git a/src/extensions/tree-view/src/tree-view.coffee b/src/extensions/tree-view/src/tree-view.coffee
index 0d6452271..19579ebeb 100644
--- a/src/extensions/tree-view/src/tree-view.coffee
+++ b/src/extensions/tree-view/src/tree-view.coffee
@@ -20,7 +20,7 @@ class TreeView extends ScrollView
       @instance = new TreeView(rootView)
       @instance.attach()
 
-  @deactivate: () ->
+  @deactivate: ->
     @instance.deactivate()
 
   @serialize: ->