diff --git a/Stack/Opc.Ua.Core/Types/Utils/Utils.cs b/Stack/Opc.Ua.Core/Types/Utils/Utils.cs
index ea8ed0f7ac..552e26a55e 100644
--- a/Stack/Opc.Ua.Core/Types/Utils/Utils.cs
+++ b/Stack/Opc.Ua.Core/Types/Utils/Utils.cs
@@ -1731,7 +1731,15 @@ namespace Opc.Ua
                 {
                     return castedObject.MemberwiseClone();
                 }
-            }
+            }           
+            // copy Opc.Ua.TimeZoneDataType
+            {
+                TimeZoneDataType castedObject = value as TimeZoneDataType;
+                if (castedObject != null)
+                {
+                    return castedObject.MemberwiseClone();
+                }
+            }           
 
             // don't know how to clone object.
             throw new NotSupportedException(Utils.Format("Don't know how to clone objects of type '{0}'", type.FullName));