diff --git a/lib/craft/bootstrap.php b/lib/craft/bootstrap.php
new file mode 100644
index 00000000..0a715eee
--- /dev/null
+++ b/lib/craft/bootstrap.php
@@ -0,0 +1,3 @@
+<?php
+
+define('CRAFT_BASE_PATH', __DIR__);
diff --git a/phpstan.neon b/phpstan.neon
index 9f7420ee..e1de15e0 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -9,4 +9,4 @@ parameters:
         # https://github.com/craftcms/cms/blob/develop/lib/craft/behaviors/CustomFieldBehavior.php
         - lib/craft/behaviors/CustomFieldBehavior.php
     bootstrapFiles:
-        - %currentWorkingDirectory%/bootstrap.php
+        - lib/craft/bootstrap.php