diff --git a/skin/xp/firebug.html b/skin/xp/firebug.html
index 0aa58054..9488af73 100644
--- a/skin/xp/firebug.html
+++ b/skin/xp/firebug.html
@@ -35,7 +35,7 @@
         
           <!-- Firebug Button -->
           <span id="fbToolbarIcon">
-            <a id="fbFirebugButton" class="fbIconButton" class="fbHover" target="_blank">&nbsp;</a>
+            <a id="fbFirebugButton" class="fbIconButton fbHover" target="_blank">&nbsp;</a>
           </span>
           
           <!-- 
@@ -212,4 +212,4 @@
 </div>
  -->
 </body>
-</html>
\ No newline at end of file
+</html>