diff --git a/bts/BTS_Tests_SMSCB.ttcn b/bts/BTS_Tests_SMSCB.ttcn
index 6d080f2..5f06f04 100644
--- a/bts/BTS_Tests_SMSCB.ttcn
+++ b/bts/BTS_Tests_SMSCB.ttcn
@@ -267,7 +267,7 @@
 		} else {
 			L1CTL.send(ts_L1CTL_DM_EST_REQ_H0(pars.chan_nr,
 							  7 /* TODO: mp_tsc */,
-							  mp_trx0_arfcn));
+							  mp_trx_pars[0].arfcn));
 		}
 	}