diff --git a/b2g/components/DirectoryProvider.js b/b2g/components/DirectoryProvider.js
index efdf8b0ab143..12c501a93a0b 100644
--- a/b2g/components/DirectoryProvider.js
+++ b/b2g/components/DirectoryProvider.js
@@ -10,23 +10,24 @@ const Cr = Components.results;
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 
-const OFFLINE_PROFILE_DIR = "/data/local"
+const LOCAL_DIR = "/data/local";
 
 function DirectoryProvider() {
 }
 
 DirectoryProvider.prototype = {
   classID: Components.ID("{9181eb7c-6f87-11e1-90b1-4f59d80dd2e5}"),
-  
+
   QueryInterface: XPCOMUtils.generateQI([Ci.nsIDirectoryServiceProvider]),
 
   getFile: function dp_getFile(prop, persistent) {
 #ifdef MOZ_WIDGET_GONK
-    if (prop == "cachePDir" || prop == "webappsDir") {
+    let localProps = ["cachePDir", "webappsDir", "PrefD"];
+    if (localProps.indexOf(prop) != -1) {
       prop.persistent = true;
       let file = Cc["@mozilla.org/file/local;1"]
                    .createInstance(Ci.nsILocalFile)
-      file.initWithPath(OFFLINE_PROFILE_DIR);
+      file.initWithPath(LOCAL_DIR);
       return file;
     }
 #endif