--- a/mail/base/content/mailWindowOverlay.xul
+++ b/mail/base/content/mailWindowOverlay.xul
@@ -453,17 +453,17 @@
   <key keycode="VK_TAB" oncommand="SwitchPaneFocus(event);" modifiers="control,shift"/>
   <key keycode="VK_TAB" oncommand="SwitchPaneFocus(event);" modifiers="control"/>
   <key keycode="VK_F6" oncommand="SwitchPaneFocus(event);" modifiers="control,shift"/>
   <key keycode="VK_F6" oncommand="SwitchPaneFocus(event);" modifiers="control"/>
   <key keycode="VK_F6" oncommand="SwitchPaneFocus(event);" modifiers="shift"/>
   <key keycode="VK_F6" oncommand="SwitchPaneFocus(event);"/>
 
   <!-- View Toggle Keys (F8) -->
-  <key id="key_toggleMessagePane" keycode="VK_F8" command="cmd_toggleMessagePane"/>
+  <key id="key_toggleMessagePane" keycode="VK_F8" oncommand="goDoCommand('cmd_toggleMessagePane');"/>
 
   <!-- Tag Keys -->
   <!-- Includes both shifted and not, for Azerty and other layouts where the
        numeric keys are shifted. -->
   <key id="key_tag0" key="&tagCmd0.key;" modifiers="shift any"
        oncommand="RemoveAllMessageTags();"/>
   <key id="key_tag1" key="&tagCmd1.key;" modifiers="shift any"
        oncommand="ToggleMessageTagKey(1);"/>