diff --git a/src/browser/atom-application.coffee b/src/browser/atom-application.coffee
index e26ad4b7c..587535aeb 100644
--- a/src/browser/atom-application.coffee
+++ b/src/browser/atom-application.coffee
@@ -351,7 +351,7 @@ class AtomApplication
     if pidToKillWhenClosed?
       @pidsToOpenWindows[pidToKillWhenClosed] = openedWindow
 
-    openedWindow.browserWindow.on 'closed', =>
+    openedWindow.browserWindow.once 'closed', =>
       @killProcessForWindow(openedWindow)
 
   # Kill all processes associated with opened windows.