diff --git a/mozilla/mail/base/content/mailWindowOverlay.xul b/mozilla/mail/base/content/mailWindowOverlay.xul
index cd993f7265b..ba26b4ff8c7 100644
--- a/mozilla/mail/base/content/mailWindowOverlay.xul
+++ b/mozilla/mail/base/content/mailWindowOverlay.xul
@@ -1164,7 +1164,9 @@
+#ifndef XP_MACOSX
+#endif