diff --git a/src/libmsc/gsm_04_08.c b/src/libmsc/gsm_04_08.c
index 3c60b1f..af20b38 100644
--- a/src/libmsc/gsm_04_08.c
+++ b/src/libmsc/gsm_04_08.c
@@ -418,6 +418,7 @@
 				&old_lai, &msc_a->via_cell.lai,
 				is_utran || net->authentication_required,
 				msc_a_try_ciphering(msc_a),
+				msc_a_require_ciphering(msc_a),
 				lu->key_seq,
 				osmo_gsm48_classmark1_is_r99(&lu->classmark1),
 				is_utran,
@@ -819,6 +820,7 @@
 			 &mi, &msc_a->via_cell.lai,
 			 is_utran || net->authentication_required,
 			 msc_a_try_ciphering(msc_a),
+			 msc_a_require_ciphering(msc_a),
 			 req->cipher_key_seq,
 			 osmo_gsm48_classmark2_is_r99(cm2, cm2_len),
 			 is_utran);
@@ -945,6 +947,7 @@
 			 &mi, &msc_a->via_cell.lai,
 			 is_utran || net->authentication_required,
 			 msc_a_try_ciphering(msc_a),
+			 msc_a_require_ciphering(msc_a),
 			 req->cipher_key_seq,
 			 osmo_gsm48_classmark2_is_r99(cm2, cm2_len),
 			 is_utran);
@@ -1307,6 +1310,7 @@
 			 VLR_PR_ARQ_T_PAGING_RESP, 0, &mi, &msc_a->via_cell.lai,
 			 is_utran || net->authentication_required,
 			 msc_a_try_ciphering(msc_a),
+			 msc_a_require_ciphering(msc_a),
 			 pr->key_seq,
 			 osmo_gsm48_classmark2_is_r99(cm2, classmark2_len),
 			 is_utran);
diff --git a/src/libmsc/msc_a.c b/src/libmsc/msc_a.c
index fad5b77..7ce70c9 100644
--- a/src/libmsc/msc_a.c
+++ b/src/libmsc/msc_a.c
@@ -116,6 +116,18 @@
 		return net->a5_encryption_mask > 0x1;
 }
 
+bool msc_a_require_ciphering(const struct msc_a *msc_a)
+{
+	struct gsm_network *net = msc_a_net(msc_a);
+	bool is_utran = (msc_a->c.ran->type == OSMO_RAT_UTRAN_IU);
+	if (is_utran)
+		return net->uea_encryption_mask
+			&& ((net->uea_encryption_mask & (1 << OSMO_UTRAN_UEA0)) == 0);
+	else
+		return net->a5_encryption_mask
+			&& ((net->a5_encryption_mask & 0x1) == 0);
+}
+
 static void update_counters(struct osmo_fsm_inst *fi, bool conn_accepted)
 {
 	struct msc_a *msc_a = fi->priv;