diff --git a/openbsc/include/openbsc/bsc_nat.h b/openbsc/include/openbsc/bsc_nat.h
index d72e3b4..2d5e228 100644
--- a/openbsc/include/openbsc/bsc_nat.h
+++ b/openbsc/include/openbsc/bsc_nat.h
@@ -214,6 +214,11 @@
 	int msc_port;
 	int first_contact;
 
+	/* timeouts */
+	int auth_timeout;
+	int ping_timeout;
+	int pong_timeout;
+
 	struct bsc_endpoint *bsc_endpoints;
 
 	/* filter */