diff --git a/packages/acn/src/models.ts b/packages/acn/src/models.ts
index 0a4df2f..0eae7e9 100644
--- a/packages/acn/src/models.ts
+++ b/packages/acn/src/models.ts
@@ -88,6 +88,14 @@ export type SDTJoinRefuseData = {
   refuseCode: number;
 };
 
+export type SDTLeavingData = {
+  leaderComponentID: string;
+  channelNumber: number;
+  memberID: number;
+  reliableSequenceNumber: number;
+  reasonCode: number;
+};
+
 export type SDTWrapperData = {
   channelNumber: number;
   totalSequenceNumber: number;
@@ -106,7 +114,7 @@ export type SDTAckData = {
 export type SessionDataTransportPDU = {
   vector: SessionDataTransportVectors;
   // TODO(jwetzell): cleanup these types
-  data: SDTJoinData | SDTJoinAcceptData | SDTJoinRefuseData | SDTWrapperData | SDTAckData | Uint8Array;
+  data: SDTJoinData | SDTJoinAcceptData | SDTJoinRefuseData | SDTWrapperData | SDTAckData | SDTLeavingData| Uint8Array;
 };
 
 export type SDTClientBlock = {
diff --git a/packages/acn/src/pdu/sdt.ts b/packages/acn/src/pdu/sdt.ts
index de68d41..72eefec 100644
--- a/packages/acn/src/pdu/sdt.ts
+++ b/packages/acn/src/pdu/sdt.ts
@@ -1,4 +1,4 @@
-import { Protocols, SDTAckData, SDTJoinAcceptData, SDTJoinData, SDTJoinRefuseData, SDTWrapperData, SessionDataTransportPDU, SessionDataTransportVectors, TransportLayerAddress } from '../models';
+import { Protocols, SDTAckData, SDTJoinAcceptData, SDTJoinData, SDTJoinRefuseData, SDTLeavingData, SDTWrapperData, SessionDataTransportPDU, SessionDataTransportVectors, TransportLayerAddress } from '../models';
 import { toHex } from '../utils';
 
 // TODO(jwetzell): work out flag inheritance, will need previous PDU
@@ -114,7 +114,7 @@ function decodeClientBlock(bytes: Uint8Array) {
 }
 
 
-function decodeData(vector: SessionDataTransportVectors, bytes: Uint8Array): SDTJoinData | SDTJoinAcceptData | SDTJoinRefuseData | SDTWrapperData | SDTAckData | Uint8Array {
+function decodeData(vector: SessionDataTransportVectors, bytes: Uint8Array): SDTJoinData | SDTJoinAcceptData | SDTJoinRefuseData | SDTWrapperData | SDTAckData | SDTLeavingData | Uint8Array {
   const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength)
   switch (vector) {
     case SessionDataTransportVectors.JOIN: {
@@ -190,6 +190,15 @@ function decodeData(vector: SessionDataTransportVectors, bytes: Uint8Array): SDT
         reliableSequenceNumber: view.getUint32(0),
       };
     }
+    case SessionDataTransportVectors.LEAVING: {
+      return {
+        leaderComponentID: toHex(bytes.subarray(0, 16)),
+        channelNumber: view.getUint16(16),
+        memberID: view.getUint16(18),
+        reliableSequenceNumber: view.getUint32(20),
+        reasonCode: view.getUint8(24),
+      };
+    }
     default:
       console.error(`unhandled SDT vector: ${vector}`);
       return bytes;