diff --git a/util.h b/util.h
index 07ec3fc..89e795c 100644
--- a/util.h
+++ b/util.h
@@ -135,7 +135,9 @@ bool stratum_send(struct pool *pool, char *s, ssize_t len);
 bool sock_full(struct pool *pool);
 char *recv_line(struct pool *pool);
 bool parse_method(struct pool *pool, char *s);
+void check_extranonce_option(struct pool *pool, char * url);
 bool extract_sockaddr(char *url, char **sockaddr_url, char **sockaddr_port);
+void extranonce_subscribe_stratum(struct pool *pool);
 bool auth_stratum(struct pool *pool);
 bool initiate_stratum(struct pool *pool);
 bool restart_stratum(struct pool *pool);