Index: uspace/lib/c/include/ns.h
===================================================================
--- uspace/lib/c/include/ns.h	(revision 4805495a910f793f8918c13f029a38a5bb548154)
+++ uspace/lib/c/include/ns.h	(revision e28175d7eb3aea0200054019deabcae2e8f6cefd)
@@ -43,10 +43,11 @@
     void *);
 extern errno_t service_register_broker(service_t, async_port_handler_t, void *);
-extern async_sess_t *service_connect(service_t, iface_t, sysarg_t);
-extern async_sess_t *service_connect_blocking(service_t, iface_t, sysarg_t);
+extern async_sess_t *service_connect(service_t, iface_t, sysarg_t, errno_t *);
+extern async_sess_t *service_connect_blocking(service_t, iface_t, sysarg_t,
+    errno_t *);
 
 extern errno_t ns_ping(void);
 extern errno_t ns_intro(task_id_t);
-extern async_sess_t *ns_session_get(void);
+extern async_sess_t *ns_session_get(errno_t *);
 
 #endif