diff --git a/lib/lifx/packet.js b/lib/lifx/packet.js
index 56901d7..e547337 100644
--- a/lib/lifx/packet.js
+++ b/lib/lifx/packet.js
@@ -206,7 +206,9 @@ Packet.headerToBuffer = function(obj) {
   buf.writeUInt8(frameAddressDescription, offset);
   offset += 1;
 
-  buf.writeUInt8(obj.sequence, offset);
+  if (typeof obj.sequence === 'number') {
+    buf.writeUInt8(obj.sequence, offset);
+  }
   offset += 1;
 
   // Protocol header
diff --git a/test/unit/packet-test.js b/test/unit/packet-test.js
index 95e2872..b3b60b5 100644
--- a/test/unit/packet-test.js
+++ b/test/unit/packet-test.js
@@ -95,7 +95,8 @@ suite('Packet', () => {
       tagged: true,
       protocolVersion: 1024,
       source: '3e805108',
-      type: 2
+      type: 2,
+      sequence: 0
     };
     let parsed = Packet.headerToBuffer(obj);
     assert.isTrue(parsed.equals(expectedResult));