diff --git a/src/Config.php b/src/Config.php
index 691d24a2..2878b37f 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -43,7 +43,7 @@ class Config
     private string $schemaPath;
 
     /** @var string */
-    private string $classesPath = PHPFHIR_DEFAULT_OUTPUT_DIR;
+    private string $classesPath;
 
     /** @var \DCarbone\PHPFHIR\Config\VersionConfig[] */
     private array $versions = [];
@@ -274,4 +274,4 @@ public function listVersions(): array
     {
         return array_keys($this->versions);
     }
-}
\ No newline at end of file
+}