diff --git a/include/proto/connection.h b/include/proto/connection.h
index 31f82b8..028dc23 100644
--- a/include/proto/connection.h
+++ b/include/proto/connection.h
@@ -51,6 +51,8 @@
 int make_proxy_line_v2(char *buf, int buf_len, struct server *srv, struct connection *remote);
 
 int conn_subscribe(struct connection *conn, int event_type, void *param);
+int conn_unsubscribe(struct connection *conn, int event_type, void *param);
+
 /* receive a NetScaler Client IP insertion header over a connection */
 int conn_recv_netscaler_cip(struct connection *conn, int flag);