diff --git a/mozilla/embedding/config/gen_mn.pl b/mozilla/embedding/config/gen_mn.pl
index 7d60a24c396..69dc994274a 100644
--- a/mozilla/embedding/config/gen_mn.pl
+++ b/mozilla/embedding/config/gen_mn.pl
@@ -46,7 +46,7 @@ if ($win32) {
   $chrome =~ s/\\/\//g;
   $platform = "en-win";
 }
-elsif ($darwin)
+elsif ($darwin) {
   $platform = "en-mac"
 }