diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index 19568fc0fa64..8dfb963fb889 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -1045,10 +1045,12 @@ function ctrlNumberTabSelection(event)
 
 #ifdef XP_MACOSX
   if (!event.metaKey)
-#elifdef XP_UNIX
+#else
+#ifdef XP_UNIX
   if (!event.altKey)
 #else
   if (!event.ctrlKey)
+#endif
 #endif
     return;