diff --git a/openbsc/include/openbsc/bsc_nat.h b/openbsc/include/openbsc/bsc_nat.h
index e8a4752..61f19f2 100644
--- a/openbsc/include/openbsc/bsc_nat.h
+++ b/openbsc/include/openbsc/bsc_nat.h
@@ -234,6 +234,7 @@
 
 	/* USSD messages  we want to match */
 	char *ussd_lst_name;
+	char *ussd_query;
 
 	/* statistics */
 	struct bsc_nat_statistics stats;