diff --git a/include/osmocom/msc/ran_msg.h b/include/osmocom/msc/ran_msg.h
index fd2439fef..816ef1f92 100644
--- a/include/osmocom/msc/ran_msg.h
+++ b/include/osmocom/msc/ran_msg.h
@@ -102,6 +102,9 @@ struct ran_cipher_mode_command {
 		/* out-argument to return the key to the caller, pass NULL if not needed. */
 		struct geran_encr *chosen_key;
 	} geran;
+	struct {
+		bool uea_encryption;
+	} utran;
 };
 
 struct ran_handover_request {
diff --git a/src/libmsc/msc_a.c b/src/libmsc/msc_a.c
index 9b6b60223..fe3af14e4 100644
--- a/src/libmsc/msc_a.c
+++ b/src/libmsc/msc_a.c
@@ -348,6 +348,9 @@ static int msc_a_ran_enc_ciphering(struct msc_a *msc_a, bool umts_aka, bool retr
 				/* for ran_a.c to store the GERAN key that is actually used */
 				.chosen_key = &msc_a->geran_encr,
 			},
+			.utran = {
+				.uea_encryption = net->uea_encryption
+			}
 		},
 	};
 
diff --git a/src/libmsc/ran_msg_iu.c b/src/libmsc/ran_msg_iu.c
index 5d134605e..6120918d9 100644
--- a/src/libmsc/ran_msg_iu.c
+++ b/src/libmsc/ran_msg_iu.c
@@ -369,7 +369,7 @@ static struct msgb *ran_iu_make_security_mode_command(struct osmo_fsm_inst *call
 
 	LOG_RAN_IU_ENC(caller_fi, LOGL_DEBUG, "Tx RANAP SECURITY MODE COMMAND to RNC, ik %s\n",
 			osmo_hexdump_nospc(cm->vec->ik, 16));
-	return ranap_new_msg_sec_mod_cmd(cm->vec->ik, NULL, RANAP_KeyStatus_new);
+	return ranap_new_msg_sec_mod_cmd(cm->vec->ik, cm->utran.uea_encryption ? cm->vec->ck : NULL, RANAP_KeyStatus_new);
 }