diff --git a/src/tests/hnb-test.h b/src/tests/hnb-test.h
index f58c177..4af50a7 100644
--- a/src/tests/hnb-test.h
+++ b/src/tests/hnb-test.h
@@ -49,6 +49,7 @@
 };
 
 struct hnb_test {
+	const char *gw_addr;
 	uint16_t gw_port;
 	/*! SCTP listen socket for incoming connections */
 	struct osmo_fd conn_fd;