diff --git a/coapthon/client/helperclient.py b/coapthon/client/helperclient.py
index 4ec0aad..eb79191 100644
--- a/coapthon/client/helperclient.py
+++ b/coapthon/client/helperclient.py
@@ -239,6 +239,8 @@ class HelperClient(object):
                     if response is not None:
                         if response.mid == request.mid:
                             return response
+                        if response.type == defines.Types["NON"]:
+                            return response
                     else:
                         return response
             except Empty: