diff --git a/epan/dissectors/asn1/x2ap/X2AP-Constants.asn b/epan/dissectors/asn1/x2ap/X2AP-Constants.asn
index 25771c5c30..6c3d9de1e7 100644
--- a/epan/dissectors/asn1/x2ap/X2AP-Constants.asn
+++ b/epan/dissectors/asn1/x2ap/X2AP-Constants.asn
@@ -107,6 +107,8 @@ id-E-RABs-ToBeSetup-Item													ProtocolIE-ID ::= 4
 id-Cause																	ProtocolIE-ID ::= 5
 id-CellInformation															ProtocolIE-ID ::= 6
 id-CellInformation-Item														ProtocolIE-ID ::= 7
+--WS extension
+id-Unknown-8															ProtocolIE-ID ::= 8
 id-New-eNB-UE-X2AP-ID														ProtocolIE-ID ::= 9
 id-Old-eNB-UE-X2AP-ID														ProtocolIE-ID ::= 10
 id-TargetCell-ID															ProtocolIE-ID ::= 11
@@ -171,6 +173,8 @@ id-CompleteFailureCauseInformation-Item										ProtocolIE-ID ::= 69
 id-CSG-Id																	ProtocolIE-ID ::= 70
 id-CSGMembershipStatus														ProtocolIE-ID ::= 71
 id-MDTConfiguration															ProtocolIE-ID ::= 72
+--WS extension
+id-Unknown-73															ProtocolIE-ID ::= 73
 id-ManagementBasedMDTallowed												ProtocolIE-ID ::= 74
 id-RRCConnSetupIndicator													ProtocolIE-ID ::= 75
 id-NeighbourTAC																ProtocolIE-ID ::= 76
@@ -241,6 +245,8 @@ id-E-RABs-ToBeReleased-RelConfItem											ProtocolIE-ID ::= 140
 id-E-RABs-SubjectToCounterCheck-List										ProtocolIE-ID ::= 141
 id-E-RABs-SubjectToCounterCheckItem											ProtocolIE-ID ::= 142
 id-CoverageModificationList													ProtocolIE-ID ::= 143
+--WS extension
+id-Unknown-144															ProtocolIE-ID ::= 144
 id-ReportingPeriodicityCSIR													ProtocolIE-ID ::= 145
 id-CSIReportList															ProtocolIE-ID ::= 146
 id-UEID																		ProtocolIE-ID ::= 147
diff --git a/epan/dissectors/packet-x2ap.c b/epan/dissectors/packet-x2ap.c
index c7636bb260..5832b795ac 100644
--- a/epan/dissectors/packet-x2ap.c
+++ b/epan/dissectors/packet-x2ap.c
@@ -140,6 +140,7 @@ typedef enum _ProtocolIE_ID_enum {
   id_Cause     =   5,
   id_CellInformation =   6,
   id_CellInformation_Item =   7,
+  id_Unknown_8 =   8,
   id_New_eNB_UE_X2AP_ID =   9,
   id_Old_eNB_UE_X2AP_ID =  10,
   id_TargetCell_ID =  11,
@@ -204,6 +205,7 @@ typedef enum _ProtocolIE_ID_enum {
   id_CSG_Id    =  70,
   id_CSGMembershipStatus =  71,
   id_MDTConfiguration =  72,
+  id_Unknown_73 =  73,
   id_ManagementBasedMDTallowed =  74,
   id_RRCConnSetupIndicator =  75,
   id_NeighbourTAC =  76,
@@ -274,6 +276,7 @@ typedef enum _ProtocolIE_ID_enum {
   id_E_RABs_SubjectToCounterCheck_List = 141,
   id_E_RABs_SubjectToCounterCheckItem = 142,
   id_CoverageModificationList = 143,
+  id_Unknown_144 = 144,
   id_ReportingPeriodicityCSIR = 145,
   id_CSIReportList = 146,
   id_UEID      = 147,
@@ -1485,6 +1488,7 @@ static const value_string x2ap_ProtocolIE_ID_vals[] = {
   { id_Cause, "id-Cause" },
   { id_CellInformation, "id-CellInformation" },
   { id_CellInformation_Item, "id-CellInformation-Item" },
+  { id_Unknown_8, "id-Unknown-8" },
   { id_New_eNB_UE_X2AP_ID, "id-New-eNB-UE-X2AP-ID" },
   { id_Old_eNB_UE_X2AP_ID, "id-Old-eNB-UE-X2AP-ID" },
   { id_TargetCell_ID, "id-TargetCell-ID" },
@@ -1549,6 +1553,7 @@ static const value_string x2ap_ProtocolIE_ID_vals[] = {
   { id_CSG_Id, "id-CSG-Id" },
   { id_CSGMembershipStatus, "id-CSGMembershipStatus" },
   { id_MDTConfiguration, "id-MDTConfiguration" },
+  { id_Unknown_73, "id-Unknown-73" },
   { id_ManagementBasedMDTallowed, "id-ManagementBasedMDTallowed" },
   { id_RRCConnSetupIndicator, "id-RRCConnSetupIndicator" },
   { id_NeighbourTAC, "id-NeighbourTAC" },
@@ -1619,6 +1624,7 @@ static const value_string x2ap_ProtocolIE_ID_vals[] = {
   { id_E_RABs_SubjectToCounterCheck_List, "id-E-RABs-SubjectToCounterCheck-List" },
   { id_E_RABs_SubjectToCounterCheckItem, "id-E-RABs-SubjectToCounterCheckItem" },
   { id_CoverageModificationList, "id-CoverageModificationList" },
+  { id_Unknown_144, "id-Unknown-144" },
   { id_ReportingPeriodicityCSIR, "id-ReportingPeriodicityCSIR" },
   { id_CSIReportList, "id-CSIReportList" },
   { id_UEID, "id-UEID" },