--- a/toolkit/content/widgets/toolbarbutton.xml
+++ b/toolkit/content/widgets/toolbarbutton.xml
@@ -81,14 +81,14 @@
     </content>
   </binding>
 
   <binding id="toolbarbutton-wrapping-label"
            extends="chrome://global/content/bindings/toolbarbutton.xml#toolbarbutton">
     <content>
       <children includes="observes|template|menupopup|panel|tooltip"/>
       <xul:image class="toolbarbutton-icon" xbl:inherits="validate,src=image,label"/>
-      <xul:label class="toolbarbutton-text" flex="1"
-                 xbl:inherits="xbl:text=label"/>
+      <xul:label class="toolbarbutton-text toolbarbutton-label" flex="1"
+                 xbl:inherits="xbl:text=label,accesskey"/>
     </content>
   </binding>
     
 </bindings>

--- a/toolkit/content/xul.css
+++ b/toolkit/content/xul.css
@@ -689,17 +689,17 @@ label {
   -moz-binding: url("chrome://global/content/bindings/text.xml#text-label");
 }
 
 label.text-link, label[onclick] {
   -moz-binding: url("chrome://global/content/bindings/text.xml#text-link");
   -moz-user-focus: normal;
 }
 
-label[control], label.radio-label, label.checkbox-label {
+label[control], label.radio-label, label.checkbox-label, label.toolbarbutton-label {
   -moz-binding: url("chrome://global/content/bindings/text.xml#label-control");
 }
 
 html|span.accesskey {
   text-decoration: underline;
 }
 
 /********** textbox **********/