diff --git a/CHANGELOG.md b/CHANGELOG.md
index 544e03941..e432b45b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 - [\#495](https://github.com/cosmos/evm/pull/495) Allow immediate SIGINT interrupt when mempool is not empty
 - [\#416](https://github.com/cosmos/evm/pull/416) Fix regression in CometBlockResultByNumber when height is 0 to use the latest block. This fixes eth_getFilterLogs RPC.
 - [\#545](https://github.com/cosmos/evm/pull/545) Check if mempool is not nil before accepting nonce gap error tx.
+- [\#585](https://github.com/cosmos/evm/pull/585) Use zero constructor to avoid nil pointer panic when BaseFee is 0d 
 
 ### IMPROVEMENTS
 
diff --git a/mempool/iterator.go b/mempool/iterator.go
index ec1875951..b7a75b91c 100644
--- a/mempool/iterator.go
+++ b/mempool/iterator.go
@@ -255,7 +255,7 @@ func (i *EVMMempoolIterator) extractCosmosEffectiveTip(tx sdk.Tx) *uint256.Int {
 		return nil // Transaction doesn't implement FeeTx interface
 	}
 
-	var bondDenomFeeAmount math.Int
+	bondDenomFeeAmount := math.ZeroInt()
 	fees := feeTx.GetFee()
 	for _, coin := range fees {
 		if coin.Denom == i.bondDenom {