diff --git a/src/net.c b/src/net.c
index c7c08c50..27a1ca1a 100644
--- a/src/net.c
+++ b/src/net.c
@@ -1325,8 +1325,12 @@ no_response(coap_pdu_t *request, coap_pdu_t *response) {
     val = coap_decode_var_bytes(coap_opt_value(nores), coap_opt_length(nores));
   }
 
-  return (COAP_RESPONSE_CLASS(request->hdr->code) > 0)
-    && (((2 << (COAP_RESPONSE_CLASS(request->hdr->code) - 1)) & val) > 0);
+  debug("response class is %d (bit %d), val is %02x\n",
+	COAP_RESPONSE_CLASS(response->hdr->code),
+	(1 << (COAP_RESPONSE_CLASS(response->hdr->code) - 1)),
+	val);
+  return (COAP_RESPONSE_CLASS(response->hdr->code) > 0)
+    && (((1 << (COAP_RESPONSE_CLASS(response->hdr->code) - 1)) & val) > 0);
 }
 
 #define WANT_WKC(Pdu,Key)					\