diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index c7232761b..d01b9af1a 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -229,7 +229,7 @@ int32_t MAX_BLOCK_SIZE(int32_t height) // make sure to change MAX_PROTOCOL_MESSA
 {
     //fprintf(stderr,"MAX_BLOCK_SIZE %d vs. %d\n",height,mainParams.consensus.vUpgrades[Consensus::UPGRADE_SAPLING].nActivationHeight);
     if ( height <= 0 || (mainParams.consensus.vUpgrades[Consensus::UPGRADE_SAPLING].nActivationHeight > 0 && height >= mainParams.consensus.vUpgrades[Consensus::UPGRADE_SAPLING].nActivationHeight) )
-        return(4096 * 1024);
+        return(_MAX_BLOCK_SIZE);
     else return(2000000);
 }
 
diff --git a/src/net.h b/src/net.h
index 3f30175c3..ff47737d8 100644
--- a/src/net.h
+++ b/src/net.h
@@ -33,6 +33,7 @@
 #include "sync.h"
 #include "uint256.h"
 #include "utilstrencodings.h"
+#include "util.h"
 
 #include <deque>
 #include <stdint.h>
@@ -63,7 +64,7 @@ static const unsigned int MAX_INV_SZ = 50000;
 /** The maximum number of new addresses to accumulate before announcing. */
 static const unsigned int MAX_ADDR_TO_SEND = 1000;
 /** Maximum length of incoming protocol messages (no message over 2 MiB is currently acceptable). */
-static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 4 * 1024 * 1024; // depends on MAX_BLOCK_SIZE
+static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = _MAX_BLOCK_SIZE;
 /** Maximum length of strSubVer in `version` message */
 static const unsigned int MAX_SUBVERSION_LENGTH = 256;
 /** -listen default */
diff --git a/src/util.h b/src/util.h
index bd1a2542a..dc421092a 100644
--- a/src/util.h
+++ b/src/util.h
@@ -3,6 +3,21 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+/******************************************************************************
+ * Copyright © 2014-2019 The SuperNET Developers.                             *
+ *                                                                            *
+ * See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at                  *
+ * the top-level directory of this distribution for the individual copyright  *
+ * holder information and the developer policies on copyright and licensing.  *
+ *                                                                            *
+ * Unless otherwise agreed in a custom licensing agreement, no part of the    *
+ * SuperNET software, including this file may be copied, modified, propagated *
+ * or distributed except according to the terms contained in the LICENSE file *
+ *                                                                            *
+ * Removal or modification of this copyright notice is prohibited.            *
+ *                                                                            *
+ ******************************************************************************/
+
 /**
  * Server/client environment: argument handling, config file parsing,
  * logging, thread wrappers
@@ -29,6 +44,8 @@
 #include <boost/signals2/signal.hpp>
 #include <boost/thread/exceptions.hpp>
 
+#define _MAX_BLOCK_SIZE (4096 * 1024) // changing just _MAX_BLOCK_SIZE will hardfork to that size
+
 static const bool DEFAULT_LOGTIMEMICROS = false;
 static const bool DEFAULT_LOGIPS        = false;
 static const bool DEFAULT_LOGTIMESTAMPS = true;