diff --git a/Database/Mysql/Schema.php b/Database/Mysql/Schema.php
index 3fea5aab..7a54b0b9 100644
--- a/Database/Mysql/Schema.php
+++ b/Database/Mysql/Schema.php
@@ -15,7 +15,7 @@ class Schema extends Component
 {
 
 	/** @var ?Connection */
-	public ?Connection $db;
+	public ?Connection $db = null;
 
 	/** @var ?Columns $_column*/
 	private ?Columns $_column = null;