diff --git a/SQLConfig/frmSQLConfig.vb b/SQLConfig/frmSQLConfig.vb
index 706b34b4..5c393248 100644
--- a/SQLConfig/frmSQLConfig.vb
+++ b/SQLConfig/frmSQLConfig.vb
@@ -10,7 +10,7 @@ Public Class frmSQLConfig
     Private ReadOnly Logger As Logger
     Private ReadOnly LogConfig As LogConfig
 
-    Public Property ConnectionString As String
+    Public Property ConnectionString As String = String.Empty
 
     Public Sub New()
         ' Dieser Aufruf ist für den Designer erforderlich.