diff --git a/system/Config/BaseConfig.php b/system/Config/BaseConfig.php
index 359fcc1488ba..300e9ffac5f9 100644
--- a/system/Config/BaseConfig.php
+++ b/system/Config/BaseConfig.php
@@ -86,7 +86,7 @@ public function __construct()
     /**
      * Initialization an environment-specific configuration setting
      *
-     * @param mixed $property
+     * @param array|bool|float|int|string|null $property
      *
      * @return void
      */