diff --git a/include/proto/backend.h b/include/proto/backend.h
index 7a248da..a6f1c9f 100644
--- a/include/proto/backend.h
+++ b/include/proto/backend.h
@@ -34,6 +34,7 @@
 int assign_server_and_queue(struct session *s);
 int connect_server(struct session *s);
 int srv_redispatch_connect(struct session *t);
+const char *backend_lb_algo_str(int algo);
 int backend_parse_balance(const char **args, char *err,
 			  int errlen, struct proxy *curproxy);