diff --git a/src/lua_engine/muds.rs b/src/lua_engine/muds.rs
index f8fde26..fcec8a4 100644
--- a/src/lua_engine/muds.rs
+++ b/src/lua_engine/muds.rs
@@ -657,7 +657,7 @@ pub(super) fn mudoutput_subnegotiation_termtype<'gc>(
                         memo: global_memo.clone(),
                         mud: socket.clone(),
                     },
-                    format!("\x00{}", "xterm").as_bytes(),
+                    format!("\x00{}", "XTERM").as_bytes(),
                 );
                 Ok(CallbackReturn::Return)
             }