diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 8c23fbdf1..7998357bc 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -291,6 +291,8 @@ public:
             }
             bin = ParseHex(signet_challenge[0]);
 
+            consensus.nMinimumChainWork = uint256{};
+            consensus.defaultAssumeValid = uint256{};
             m_assumed_blockchain_size = 0;
             m_assumed_chain_state_size = 0;
             chainTxData = ChainTxData{
@@ -309,7 +311,9 @@ public:
         consensus.signet_blocks = true;
         consensus.signet_challenge.assign(bin.begin(), bin.end());
         consensus.nSubsidyHalvingInterval = 210000;
+        consensus.BIP16Exception = uint256{};
         consensus.BIP34Height = 1;
+        consensus.BIP34Hash = uint256{};
         consensus.BIP65Height = 1;
         consensus.BIP66Height = 1;
         consensus.CSVHeight = 1;
@@ -389,8 +393,8 @@ public:
         consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
         consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
 
-        consensus.nMinimumChainWork = uint256S("0x00");
-        consensus.defaultAssumeValid = uint256S("0x00");
+        consensus.nMinimumChainWork = uint256{};
+        consensus.defaultAssumeValid = uint256{};
 
         pchMessageStart[0] = 0xfa;
         pchMessageStart[1] = 0xbf;