diff --git a/browser/base/content/browser-sets.inc b/browser/base/content/browser-sets.inc
index e0489a44a9ef..9a9d617d111c 100644
--- a/browser/base/content/browser-sets.inc
+++ b/browser/base/content/browser-sets.inc
@@ -358,6 +358,12 @@
          modifiers="accel,shift"
 #else
          modifiers="accel"
+#endif
+# On OS X, dark voodoo magic invokes the quit code for this key.
+# So we're not adding the attribute on OSX because of backwards/add-on compat.
+# See bug 1369909 for background on this.
+#ifndef XP_MACOSX
+         command="cmd_quitApplication"
 #endif
          reserved="true"/>