diff --git a/core/src/packet.rs b/core/src/packet.rs
index 81645145..de780f13 100644
--- a/core/src/packet.rs
+++ b/core/src/packet.rs
@@ -31,7 +31,11 @@ pub enum PacketType {
     TrackEndedTime = 0x82,
     UnknownDataAllZeros = 0x1f,
     PreferredLocale = 0x74,
-    Unknown0x4f = 0x4f,
     Unknown0x0f = 0x0f,
     Unknown0x10 = 0x10,
+    Unknown0x4f = 0x4f,
+
+    // TODO - occurs when subscribing with an empty URI. Maybe a MercuryError?
+    // Payload: b"\0\x08\0\0\0\0\0\0\0\0\x01\0\x01\0\x03 \xb0\x06"
+    Unknown0xb6 = 0xb6,
 }