diff --git a/src/atom-environment.coffee b/src/atom-environment.coffee
index d9694d4ef..c116f777b 100644
--- a/src/atom-environment.coffee
+++ b/src/atom-environment.coffee
@@ -443,7 +443,7 @@ class AtomEnvironment extends Model
   # Extended: Focus the current window.
   focus: ->
     @applicationDelegate.focusWindow()
-    window.focus()
+    @window.focus()
 
   # Extended: Show the current window.
   show: ->