diff --git a/33128/r18/TS33128Payloads.asn b/33128/r18/TS33128Payloads.asn
index 74d9b275432b00b9b7f8681a2f813441f33434bd..0f24e9925a4e8e110d108ba9d245a0a7c4882d33 100644
--- a/33128/r18/TS33128Payloads.asn
+++ b/33128/r18/TS33128Payloads.asn
@@ -4227,14 +4227,15 @@ PTCAccessPolicyFailure  ::= ENUMERATED
 -- See clause 7.12.4.2.1 for details of this structure
 IMSMessage ::= SEQUENCE
 {
-    payload                    [1] IMSPayload,
-    sessionDirection           [2] SessionDirection,
-    voIPRoamingIndication      [3] VoIPRoamingIndication OPTIONAL,
+    payload                      [1] IMSPayload,
+    sessionDirection             [2] SessionDirection,
+    voIPRoamingIndication        [3] VoIPRoamingIndication OPTIONAL,
     -- Tag [4] is not used.
     -- Tag [5] is not used.
-    location                   [6] Location OPTIONAL,
-    accessNetworkInformation   [7] SEQUENCE OF SIPAccessNetworkInformation OPTIONAL,
-    cellularNetworkInformation [8] SEQUENCE OF SIPCellularNetworkInformation OPTIONAL
+    location                     [6] Location OPTIONAL,
+    accessNetworkInformation     [7] SEQUENCE OF SIPAccessNetworkInformation OPTIONAL,
+    cellularNetworkInformation   [8] SEQUENCE OF SIPCellularNetworkInformation OPTIONAL,
+    numberTranslationInformation [9] SEQUENCE OF NumberTranslation OPTIONAL
 }
 
 -- See clause 7.12.4.2.2 for details of this structure
@@ -4286,6 +4287,18 @@ ModifiedSIPMessage ::= SEQUENCE
     modifications      [2] PayloadModifications
 }
 
+NumberTranslation ::= SEQUENCE
+{
+    partyIndication  [1] PartyIndication,
+    translationInput [2] TranslationInput
+}
+
+PartyIndication ::= ENUMERATED
+{
+    callingParty(1),
+    calledParty(2)
+}
+
 SIPMessage ::= SEQUENCE
 {
     iPSourceAddress       [1] IPAddress,
@@ -4293,6 +4306,11 @@ SIPMessage ::= SEQUENCE
     sIPContent            [3] OCTET STRING
 }
 
+TranslationInput ::= CHOICE
+{
+    iMSIdentities [1] IMSSubscriberIDs
+}
+
 VoIPRoamingIndication ::= ENUMERATED
 {
     roamingLBO(1),