diff --git a/Packet-structure.md b/Packet-structure.md
index 5fae3d6..2e7dba1 100644
--- a/Packet-structure.md
+++ b/Packet-structure.md
@@ -3,4 +3,6 @@
 * Packet type: 1 byte
 * Packet data
 
-If the initial ObjID is "CO" (254), Packet data consists of ObjIDs followed by packet data for the packet type.
\ No newline at end of file
+If the initial ObjID is "CO" (254), Packet data consists of ObjIDs followed by packet data for the packet type.
+
+WorldsString: 1 byte for remaining length in bytes, then the string in [Modified UTF-8 encoding](https://docs.oracle.com/javase/6/docs/api/java/io/DataInput.html#modified-utf-8)
\ No newline at end of file