diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h
index 510068b..d76b9f7 100644
--- a/src/vnet/session/application_interface.h
+++ b/src/vnet/session/application_interface.h
@@ -271,18 +271,18 @@
 #undef _
 } session_fd_flag_t;
 
-int parse_uri (char *uri, session_endpoint_cfg_t * sep);
-int vnet_bind_uri (vnet_listen_args_t *);
-int vnet_unbind_uri (vnet_unlisten_args_t * a);
-int vnet_connect_uri (vnet_connect_args_t * a);
+session_error_t parse_uri (char *uri, session_endpoint_cfg_t *sep);
+session_error_t vnet_bind_uri (vnet_listen_args_t *);
+session_error_t vnet_unbind_uri (vnet_unlisten_args_t *a);
+session_error_t vnet_connect_uri (vnet_connect_args_t *a);
 
-int vnet_application_attach (vnet_app_attach_args_t * a);
-int vnet_application_detach (vnet_app_detach_args_t * a);
-int vnet_listen (vnet_listen_args_t * a);
-int vnet_connect (vnet_connect_args_t * a);
-int vnet_unlisten (vnet_unlisten_args_t * a);
-int vnet_shutdown_session (vnet_shutdown_args_t *a);
-int vnet_disconnect_session (vnet_disconnect_args_t * a);
+session_error_t vnet_application_attach (vnet_app_attach_args_t *a);
+session_error_t vnet_application_detach (vnet_app_detach_args_t *a);
+session_error_t vnet_listen (vnet_listen_args_t *a);
+session_error_t vnet_connect (vnet_connect_args_t *a);
+session_error_t vnet_unlisten (vnet_unlisten_args_t *a);
+session_error_t vnet_shutdown_session (vnet_shutdown_args_t *a);
+session_error_t vnet_disconnect_session (vnet_disconnect_args_t *a);
 
 int vnet_app_add_cert_key_pair (vnet_app_add_cert_key_pair_args_t * a);
 int vnet_app_del_cert_key_pair (u32 index);