diff --git a/install_minimal/upgrades/airtime-1.9.0/airtime-upgrade.php b/install_minimal/upgrades/airtime-1.9.0/airtime-upgrade.php
index a8b977fa1..672e731ec 100644
--- a/install_minimal/upgrades/airtime-1.9.0/airtime-upgrade.php
+++ b/install_minimal/upgrades/airtime-1.9.0/airtime-upgrade.php
@@ -633,7 +633,7 @@ class Airtime190Upgrade{
 
         //HANDLE LINKED FILES HERE.
 
-        $files = CcFilesQuery::create()
+        $db_files = CcFilesQuery::create()
            ->setFormatter(ModelCriteria::FORMAT_ON_DEMAND)
            ->filterByDbDirectory(NULL)
            ->find();