diff --git a/umbraco/cms/businesslogic/ContentType.cs b/umbraco/cms/businesslogic/ContentType.cs
index 70532eed4c..66b5d018d9 100644
--- a/umbraco/cms/businesslogic/ContentType.cs
+++ b/umbraco/cms/businesslogic/ContentType.cs
@@ -12,6 +12,7 @@ using umbraco.cms.businesslogic.language;
 using umbraco.cms.businesslogic.propertytype;
 using umbraco.cms.businesslogic.web;
 using umbraco.DataLayer;
+using Tuple = System.Tuple;
 using umbraco.BusinessLogic;
 
 [assembly: InternalsVisibleTo("Umbraco.Test")]