diff --git a/src/net/grunt/ClientLink.cpp b/src/net/grunt/ClientLink.cpp
index 09fac93..ff856c2 100644
--- a/src/net/grunt/ClientLink.cpp
+++ b/src/net/grunt/ClientLink.cpp
@@ -366,7 +366,7 @@ void Grunt::ClientLink::LogonNewSession(const Grunt::ClientLink::Logon& logon) {
 
     CDataStoreCache<1024> clientChallenge;
 
-    uint8_t opcode = 0;
+    uint8_t opcode = CMD_AUTH_LOGON_CHALLENGE;
     clientChallenge.Put(opcode);
 
     uint8_t protocol = 8;