diff --git a/BeWoPlanerMobil/Models/AbstractModel.cs b/BeWoPlanerMobil/Models/AbstractModel.cs
index 2b623c7fd..42e3dc77a 100644
--- a/BeWoPlanerMobil/Models/AbstractModel.cs
+++ b/BeWoPlanerMobil/Models/AbstractModel.cs
@@ -4,6 +4,7 @@ using System.Web;
 using BeWoPlanerMobil.Service;
 using BeWoPlanerMobil.Util;
 using BS.Shared;
+using BS.Shared.Core;
 using BS.Shared.DataContracts;
 
 namespace BeWoPlanerMobil.Models