diff --git a/toolkit/components/typeaheadfind/content/findBar.js b/toolkit/components/typeaheadfind/content/findBar.js
index 4af88c3b6567..4bfd54edbcc8 100755
--- a/toolkit/components/typeaheadfind/content/findBar.js
+++ b/toolkit/components/typeaheadfind/content/findBar.js
@@ -638,7 +638,7 @@ var gFindBar = {
     if (this.mTypeAheadCaseSensitive == 1)
       return true;
 
-    return (str != str.toLowerCase() && str != str.toUpperCase());
+    return (str != str.toLowerCase());
   },
 
   onFindBarFocus: function ()