diff --git a/mozilla/toolkit/content/widgets/preferences.xml b/mozilla/toolkit/content/widgets/preferences.xml
index c46c3ae0e3e..e12a5354c17 100644
--- a/mozilla/toolkit/content/widgets/preferences.xml
+++ b/mozilla/toolkit/content/widgets/preferences.xml
@@ -432,7 +432,16 @@
           <children includes="prefpane"/>
         </xul:deck>
       </xul:hbox>
-      <xul:hbox pack="end" anonid="dlg-buttons" class="prefWindow-dlgbuttons">
+      <xul:hbox anonid="dlg-buttons" class="prefWindow-dlgbuttons" pack="end">
+#ifdef XP_UNIX
+        <xul:button dlgtype="disclosure" class="dialog-button" hidden="true"/>
+        <xul:button dlgtype="help" class="dialog-button" hidden="true" icon="help"/>
+        <xul:button dlgtype="extra2" class="dialog-button" hidden="true"/>
+        <xul:button dlgtype="extra1" class="dialog-button" hidden="true"/>
+        <xul:spacer anonid="spacer" flex="1" hidden="true"/>
+        <xul:button dlgtype="cancel" class="dialog-button" icon="cancel"/>
+        <xul:button dlgtype="accept" class="dialog-button" icon="accept"/>
+#else
         <xul:button dlgtype="extra2" class="dialog-button" hidden="true"/>
         <xul:spacer anonid="spacer" flex="1" hidden="true"/>
         <xul:button dlgtype="accept" class="dialog-button" icon="accept"/>
@@ -440,6 +449,7 @@
         <xul:button dlgtype="cancel" class="dialog-button" icon="cancel"/>
         <xul:button dlgtype="help" class="dialog-button" hidden="true" icon="help"/>
         <xul:button dlgtype="disclosure" class="dialog-button" hidden="true"/>
+#endif
       </xul:hbox>
       <xul:hbox>
         <children/>