diff --git a/src/cw/cw.h b/src/cw/cw.h
index 03b933d1..dba79349 100644
--- a/src/cw/cw.h
+++ b/src/cw/cw.h
@@ -492,7 +492,7 @@ int cw_put_elem_radio_administrative_state(uint8_t * dst, int rid, int state);
 int cw_put_local_ip_address(uint8_t *dst, int id, int ipv_id, int ipv6_id, 
 				uint8_t *src, int len);
 
-
+int cw_detect_nat(struct conn *conn);
 
 uint8_t *cw_init_data_keep_alive_msg(uint8_t * buffer,uint8_t *rmac);