diff --git a/src/libmsc/mncc.c b/src/libmsc/mncc.c
index 8c95ecb..d0b2ff2 100644
--- a/src/libmsc/mncc.c
+++ b/src/libmsc/mncc.c
@@ -100,6 +100,7 @@
 void mncc_set_cause(struct gsm_mncc *data, int loc, int val)
 {
 	data->fields |= MNCC_F_CAUSE;
+	data->cause.coding = GSM48_CAUSE_CODING_GSM;
 	data->cause.location = loc;
 	data->cause.value = val;
 }
diff --git a/tests/msc_vlr/msc_vlr_test_call.c b/tests/msc_vlr/msc_vlr_test_call.c
index 6805f1a..065af25 100644
--- a/tests/msc_vlr/msc_vlr_test_call.c
+++ b/tests/msc_vlr/msc_vlr_test_call.c
@@ -401,7 +401,7 @@
 	 * this only worked synchronously, i.e. only with internal MNCC. Instead of mimicking that, we need a proper
 	 * async solution that also works with a PBX. */
 	cc_to_mncc_expect_tx("", MNCC_REL_CNF);
-	dtap_expect_tx("032d080281af"); /* CC: Release */
+	dtap_expect_tx("032d0802e1af"); /* CC: Release */
 	expect_iu_release();
 	msc_a_release_cn(msub_msc_a(g_msub));
 	OSMO_ASSERT(dtap_tx_confirmed);
diff --git a/tests/msc_vlr/msc_vlr_test_call.err b/tests/msc_vlr/msc_vlr_test_call.err
index d5fd893..bbfa61b 100644
--- a/tests/msc_vlr/msc_vlr_test_call.err
+++ b/tests/msc_vlr/msc_vlr_test_call.err
@@ -1184,7 +1184,7 @@
 DCC trans(CC IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu:PAGING_RESP callref-0x423 tid-0) starting timer T308 with 10 seconds
 DCC trans(CC IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu:PAGING_RESP callref-0x423 tid-0) new state CALL_RECEIVED -> RELEASE_REQ
 DMSC msc_a(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu:PAGING_RESP){MSC_A_ST_RELEASING}: RAN encode: DTAP on UTRAN-Iu
-- DTAP --UTRAN-Iu--> MS: GSM48_MT_CC_RELEASE: 032d080281af
+- DTAP --UTRAN-Iu--> MS: GSM48_MT_CC_RELEASE: 032d0802e1af
 - DTAP matches expected message
 DMSC dummy_msc_i(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu:PAGING_RESP){0}: Received Event MSC_I_EV_FROM_A_FORWARD_ACCESS_SIGNALLING_REQUEST
 DMNCC trans(CC IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu:PAGING_RESP callref-0x423 tid-0) tx MNCC_REL_CNF