diff --git a/phpstan.neon b/phpstan.neon
index 045b26d..ebb0513 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,6 +1,7 @@
 parameters:
     scanFiles:
       - src/IntelliSenseHelper.php
+      - ../../oxid-esales/oxideshop-ce/source/oxfunctions.php
     paths:
         - src
     level: 0