diff --git a/backend/lib/Model/Data.php b/backend/lib/Model/Data.php
index 03b07fb..e41c428 100644
--- a/backend/lib/Model/Data.php
+++ b/backend/lib/Model/Data.php
@@ -44,7 +44,7 @@ use Volkszaehler\Model;
 class Data {
 	/**
 	 * @Id
-	 * @Column(type="smallint", nullable=false)
+	 * @Column(type="integer", nullable=false)
 	 * @GeneratedValue(strategy="AUTO")
 	 *
 	 * @todo wait until DDC-117 is fixed (PKs on FKs)