diff --git a/airtime_mvc/application/models/Preference.php b/airtime_mvc/application/models/Preference.php
index 30c6e80d9..08bd14137 100644
--- a/airtime_mvc/application/models/Preference.php
+++ b/airtime_mvc/application/models/Preference.php
@@ -220,7 +220,7 @@ class Application_Model_Preference
             $fade = $out;
         }
 
-        $fade = number_format($fade, 1);
+        $fade = number_format($fade, 1, '.', '');
         //fades need 2 leading zeros for DateTime conversion
         $fade = str_pad($fade, 4, "0", STR_PAD_LEFT);