diff --git a/src/game/Opcodes.cpp b/src/game/Opcodes.cpp
index 43360ad15..65963ae44 100644
--- a/src/game/Opcodes.cpp
+++ b/src/game/Opcodes.cpp
@@ -345,7 +345,7 @@ OpcodeHandler opcodeTable[NUM_MSG_TYPES] =
     /*0x13C*/ { "SMSG_AI_REACTION",                             STATUS_NEVER,    &WorldSession::Handle_ServerSide               },
     /*0x13D*/ { "CMSG_SET_SELECTION",                           STATUS_LOGGEDIN, &WorldSession::HandleSetSelectionOpcode        },
     /*0x13E*/ { "CMSG_EQUIPMENT_SET_DELETE",                    STATUS_LOGGEDIN, &WorldSession::HandleEquipmentSetDelete        },
-    /*0x13F*/ { "CMSG_UNUSED",                                  STATUS_NEVER,    &WorldSession::Handle_NULL                     },
+    /*0x13F*/ { "CMSG_INSTANCE_LOCK_RESPONSE",                  STATUS_NEVER,    &WorldSession::Handle_NULL                     },
     /*0x140*/ { "CMSG_UNUSED2",                                 STATUS_NEVER,    &WorldSession::Handle_NULL                     },
     /*0x141*/ { "CMSG_ATTACKSWING",                             STATUS_LOGGEDIN, &WorldSession::HandleAttackSwingOpcode         },
     /*0x142*/ { "CMSG_ATTACKSTOP",                              STATUS_LOGGEDIN, &WorldSession::HandleAttackStopOpcode          },
diff --git a/src/game/Opcodes.h b/src/game/Opcodes.h
index 86dca25d0..dd29732d9 100644
--- a/src/game/Opcodes.h
+++ b/src/game/Opcodes.h
@@ -353,7 +353,7 @@ enum Opcodes
     SMSG_AI_REACTION                                = 0x13C,
     CMSG_SET_SELECTION                              = 0x13D,
     CMSG_EQUIPMENT_SET_DELETE                       = 0x13E,
-    CMSG_UNUSED                                     = 0x13F,
+    CMSG_INSTANCE_LOCK_RESPONSE                     = 0x13F,
     CMSG_UNUSED2                                    = 0x140,
     CMSG_ATTACKSWING                                = 0x141,
     CMSG_ATTACKSTOP                                 = 0x142,
diff --git a/src/game/UpdateFields.h b/src/game/UpdateFields.h
index fbc39167b..b1d88b420 100644
--- a/src/game/UpdateFields.h
+++ b/src/game/UpdateFields.h
@@ -19,7 +19,7 @@
 #ifndef _UPDATEFIELDS_AUTO_H
 #define _UPDATEFIELDS_AUTO_H
 
-// Auto generated for version 0, 1, 0, 9658
+// Auto generated for version 0, 1, 0, 9684
 
 enum EObjectFields
 {
diff --git a/src/realmd/AuthCodes.h b/src/realmd/AuthCodes.h
index 92e9b9a12..c379da01b 100644
--- a/src/realmd/AuthCodes.h
+++ b/src/realmd/AuthCodes.h
@@ -66,8 +66,8 @@ enum LoginResult
 
 // we need to stick to 1 version or half of the stuff will work for someone
 // others will not and opposite
-// will only support WoW, WoW:TBC and WoW:WotLK 3.1.0 client build 9658...
+// will only support WoW, WoW:TBC and WoW:WotLK 3.1.0 client build 9684...
 
-#define EXPECTED_MANGOS_CLIENT_BUILD        {9658, 0}
+#define EXPECTED_MANGOS_CLIENT_BUILD        {9684, 0}
 
 #endif