diff --git a/Elwig/Models/AreaCom.cs b/Elwig/Models/AreaCom.cs
index 780140e..aebc26e 100644
--- a/Elwig/Models/AreaCom.cs
+++ b/Elwig/Models/AreaCom.cs
@@ -28,7 +28,7 @@ namespace Elwig.Models {
         public string GstNr { get; set; }
 
         [Column("rdnr")]
-        public int RdNr { get; set; }
+        public int? RdNr { get; set; }
 
         [Column("year_from")]
         public int YearFrom { get; set; }