diff --git a/xpfe/components/prefwindow/resources/content/pref-smart_browsing.xul b/xpfe/components/prefwindow/resources/content/pref-smart_browsing.xul
index eba8f497cee..7bb71ef8abf 100644
--- a/xpfe/components/prefwindow/resources/content/pref-smart_browsing.xul
+++ b/xpfe/components/prefwindow/resources/content/pref-smart_browsing.xul
@@ -47,7 +47,7 @@
   
   var _elementIDs = ["browserGoBrowsingEnabled", "browserAutoCompleteEnabled",
                      "browserUrlbarAutoFill", "browserUrlbarShowPopup", "browserUrlbarShowSearch",
-                     "browserUrlbarMatchOnlyTyped"];
+                     "browserUrlbarMatchOnlyTyped", "domainGuessingEnabled"];
   
   ]]>
   </script>
@@ -86,4 +86,12 @@
             prefstring="browser.urlbar.matchOnlyTyped"/>
     </hbox>
   </groupbox>
+
+  <groupbox>
+    <caption label="&domainGuessingHeader.label;"/>
+
+    <checkbox id="domainGuessingEnabled"
+              label="&domainGuessingEnabled.label;"
+              prefstring="browser.fixup.alternate.enabled"/>
+  </groupbox>
 </page>
diff --git a/xpfe/components/prefwindow/resources/locale/en-US/pref-smart_browsing.dtd b/xpfe/components/prefwindow/resources/locale/en-US/pref-smart_browsing.dtd
index 6f9b58242ab..6e70286f132 100644
--- a/xpfe/components/prefwindow/resources/locale/en-US/pref-smart_browsing.dtd
+++ b/xpfe/components/prefwindow/resources/locale/en-US/pref-smart_browsing.dtd
@@ -25,3 +25,5 @@
 <!ENTITY  autoCompleteMatchOnlyTyped.label       "Match only websites you've typed previously">
 <!ENTITY  autocompletePreview.label              "Preview">
 
+<!ENTITY  domainGuessingHeader.label             "Domain Guessing">
+<!ENTITY  domainGuessingEnabled.label            "Automatically add &quot;www.&quot; and &quot;.com&quot; to the location if a web page isn't found.">