diff --git a/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/User.kt b/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/User.kt
index bc3b4581..634ba1f3 100644
--- a/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/User.kt
+++ b/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/User.kt
@@ -52,7 +52,7 @@ open class User(
     open val tanMedia: List<TanMedium> = listOf(),
 
     var bankingGroup: BankingGroup? = null,
-    open var finTsServerAddress: String
+    open var serverAddress: String? = null
 ) {
 
     var userSetDisplayName: String? = null