diff --git a/33128/r18/TS33128Payloads.asn b/33128/r18/TS33128Payloads.asn
index b631e4fd15b4f754ddd041ad472e21605b3bd94c..42bd24e0c4a18b5581231a59a7a81ad91753d91b 100644
--- a/33128/r18/TS33128Payloads.asn
+++ b/33128/r18/TS33128Payloads.asn
@@ -6613,8 +6613,18 @@ IMSIUnauthenticatedIndication ::= BOOLEAN
 
 IMSSubscriberIDs ::= CHOICE
 {
-    iMPI        [1] IMPI,
-    iMPU        [2] IMPU
+    -- deprecatedIMPI and deprecatedIMPU were deprecated in r(18) version15(15)
+    deprecatedIMPI        [1] IMPI,
+    deprecatedIMPU        [2] IMPU,
+    iMSSubscriberIDs      [3] SEQUENCE (SIZE (1..MAX)) OF IMSSubscriberIdentity
+}
+
+IMSSubscriberIdentity ::= CHOICE
+{
+    iMPI [1] IMPI,
+    iMPU [2] IMPU,
+    pEI  [3] PEI,
+    iMEI [4] IMEI
 }
 
 Initiator ::= ENUMERATED