diff --git a/install/upgrades/airtime-1.8.1/airtime-upgrade.php b/install/upgrades/airtime-1.8.1/airtime-upgrade.php
index 8f36fd1f0..5e3f62f94 100644
--- a/install/upgrades/airtime-1.8.1/airtime-upgrade.php
+++ b/install/upgrades/airtime-1.8.1/airtime-upgrade.php
@@ -18,17 +18,21 @@ const CONF_DIR_STORAGE = "/srv/airtime";
 const CONF_DIR_WWW = "/var/www/airtime";
 const CONF_DIR_LOG = "/var/log/airtime";
 
-global $AIRTIME_SRC = __DIR__.'/../../../airtime_mvc';
-global $AIRTIME_UTILS = __DIR__.'/../../../utils';
-global $AIRTIME_PYTHON_APPS = __DIR__.'/../../../python_apps';
+global $AIRTIME_SRC;
+global $AIRTIME_UTILS;
+global $AIRTIME_PYTHON_APPS;
+
+global $CC_CONFIG;
+
+$AIRTIME_SRC = __DIR__.'/../../../airtime_mvc';
+$AIRTIME_UTILS = __DIR__.'/../../../utils';
+$AIRTIME_PYTHON_APPS = __DIR__.'/../../../python_apps';
 
 $configFiles = array(CONF_FILE_AIRTIME,
                      CONF_FILE_PYPO,
                      CONF_FILE_RECORDER,
                      CONF_FILE_LIQUIDSOAP);
 
-global $CC_CONFIG;
-
 $CC_CONFIG = array(
     // prefix for table names in the database
     'tblNamePrefix' => 'cc_',