diff --git a/xpfe/components/prefwindow/resources/content/pref-languages.js b/xpfe/components/prefwindow/resources/content/pref-languages.js
index 0a9402d7e0d..cfcbb7ce456 100644
--- a/xpfe/components/prefwindow/resources/content/pref-languages.js
+++ b/xpfe/components/prefwindow/resources/content/pref-languages.js
@@ -320,6 +320,8 @@ function AddAvailableLanguage()
     Languageid	    = otherField.value;
     Languageid      = Languageid.toLowerCase();
 	  Languagename		= GetLanguageTitle(Languageid);
+    if (!Languagename)
+       Languagename = '[' + Languageid + ']';
 	  already_active	= false;	
   
     if (!LangAlreadyActive(Languageid)) {