diff --git a/libmachdev/net.c b/libmachdev/net.c
index 606765f..766d9b4 100644
--- a/libmachdev/net.c
+++ b/libmachdev/net.c
@@ -212,7 +212,7 @@ deliver_msg(struct net_rcv_msg *msg, if_filter_list_t *ifp)
 			  MACH_SEND_MSG|MACH_SEND_TIMEOUT,
 			  msg->msg_hdr.msgh_size, 0, MACH_PORT_NULL,
 			  0, MACH_PORT_NULL);
-	  if (err != MACH_MSG_SUCCESS)
+	  if (0 && err != MACH_MSG_SUCCESS)
 	    {
 	      /* TODO: remove from filter */
 	    }
@@ -377,7 +377,7 @@ device_open (mach_port_t reply_port, mach_msg_type_name_t reply_port_type,
     }
 
   *devp = ports_get_right (nd);
-  *devicePoly = MACH_MSG_TYPE_COPY_SEND;
+  *devicePoly = MACH_MSG_TYPE_MAKE_SEND;
   return D_SUCCESS;
 }
 
diff --git a/libmachdev/ds_routines.c b/libmachdev/ds_routines.c
index 6b8d1d4..f0c034f 100644
--- a/libmachdev/ds_routines.c
+++ b/libmachdev/ds_routines.c
@@ -206,7 +206,7 @@ ds_device_close (device_t dev)
   ret = (device->emul_ops->close
 	 ? (*device->emul_ops->close) (device->emul_data)
 	 : D_SUCCESS);
-  mach_device_deallocate (device_to_pi (device));
+  //mach_device_deallocate (device_to_pi (device));
 
   ports_port_deref (device_to_pi (device));
   return ret;