diff --git a/src/realmd/AuthSocket.cpp b/src/realmd/AuthSocket.cpp
index 2a8a16b2c..e625eb322 100644
--- a/src/realmd/AuthSocket.cpp
+++ b/src/realmd/AuthSocket.cpp
@@ -834,7 +834,8 @@ bool AuthSocket::_HandleReconnectProof()
         ByteBuffer pkt;
         pkt << (uint8)  CMD_AUTH_RECONNECT_PROOF;
         pkt << (uint8)  0x00;
-        pkt << (uint16) 0x00;                               // 2 bytes zeros
+        if (_build > 6141) // Last vanilla, 1.12.3
+		    pkt << (uint16) 0x00;                               // 2 bytes zeros
         send((char const*)pkt.contents(), pkt.size());
 
         ///- Set _authed to true!
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index ca7169d17..904a196c4 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "12678"
+ #define REVISION_NR "12679"
 #endif // __REVISION_NR_H__