diff --git a/lib/messaging/message/copy.rb b/lib/messaging/message/copy.rb
index <HASH>..<HASH> 100644
--- a/lib/messaging/message/copy.rb
+++ b/lib/messaging/message/copy.rb
@@ -21,7 +21,7 @@ module Messaging
           receiver = receiver.build
         end
 
-        if include.nil?
+        if copy.nil? && include.nil?
           include = source.class.attribute_names
         end
Default attribute names for copy are corrected