diff --git a/src/knx/group_object.h b/src/knx/group_object.h
index 244fab6..344717e 100644
--- a/src/knx/group_object.h
+++ b/src/knx/group_object.h
@@ -51,7 +51,7 @@ typedef void (*GroupObjectUpdatedHandler)(GroupObject& go);
 class GroupObject
 {
     friend class GroupObjectTableObject;
-
+    GroupObject(const GroupObject& other) = delete;
   public:
     /**
      * The constructor.