diff --git a/mozilla/minimo/chrome/content/preferences/preferences.js b/mozilla/minimo/chrome/content/preferences/preferences.js
index 01f79db67e6..edca7082a77 100644
--- a/mozilla/minimo/chrome/content/preferences/preferences.js
+++ b/mozilla/minimo/chrome/content/preferences/preferences.js
@@ -46,7 +46,7 @@ function readCacheLocationPref()
 
 
   var pref = document.getElementById("browser.cache.disk.parent_directory");
-  if (pref.value != null)
+  if (pref.value != "")
       return true;
   else
       return false;