diff --git a/include/osmocom/msc/transaction.h b/include/osmocom/msc/transaction.h
index cab0030..61d8c1a 100644
--- a/include/osmocom/msc/transaction.h
+++ b/include/osmocom/msc/transaction.h
@@ -103,6 +103,7 @@
 			struct osmo_timer_list timer;
 			struct osmo_timer_list timer_guard;
 			struct gsm_mncc msg;	/* stores setup/disconnect/release message */
+			bool mncc_initiated;	/* Whether an MNCC Release is necessary on failure */
 		} cc;
 		struct {
 			struct gsm411_smc_inst smc_inst;