diff --git a/browser/components/sidebar/src/Makefile.in b/browser/components/sidebar/src/Makefile.in
index 989239b402040..5aaf21f273817 100644
--- a/browser/components/sidebar/src/Makefile.in
+++ b/browser/components/sidebar/src/Makefile.in
@@ -42,7 +42,7 @@ VPATH		= @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
-EXTRA_COMPONENTS = nsSidebar.js
+EXTRA_PP_COMPONENTS = nsSidebar.js
 
 include $(topsrcdir)/config/rules.mk
 
diff --git a/browser/components/sidebar/src/nsSidebar.js b/browser/components/sidebar/src/nsSidebar.js
index 424e78c114460..0f4ed69eacc84 100644
--- a/browser/components/sidebar/src/nsSidebar.js
+++ b/browser/components/sidebar/src/nsSidebar.js
@@ -121,18 +121,30 @@ function (aTitle, aContentURL, aCustomizeURL, aPersist)
     if (!sidebarURLSecurityCheck(aContentURL))
       return;
 
+#ifdef MOZ_PLACES_BOOKMARKS
+    var uri = null;
+    var ioService = Components.classes["@mozilla.org/network/io-service;1"]
+                              .getService(Components.interfaces.nsIIOService);
+    try {
+      uri = ioService.newURI(aContentURL, null, null);
+    }
+    catch(ex) { return; }
+
+    win.PlacesUtils.showAddBookmarkUI(uri, aTitle, null, true, true);
+#else
     var dialogArgs = {
       name: aTitle,
       url: aContentURL,
       bWebPanel: true
     }
-    var features;
-    if (!/Mac/.test(win.navigator.platform))
-      features = "centerscreen,chrome,dialog,resizable,dependent";
-    else
-      features = "chrome,dialog,resizable,modal";
+#ifdef XP_MACOSX
+    var features = "chrome,dialog,resizable,modal";
+#else
+    var features = "centerscreen,chrome,dialog,resizable,dependent";
+#endif
     win.openDialog("chrome://browser/content/bookmarks/addBookmark2.xul", "",
                    features, dialogArgs);
+#endif
 }
 
 nsSidebar.prototype.validateSearchEngine =