diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30bfa135..19e51ec4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* (rpc) [\#529](https://github.com/tharsis/ethermint/pull/975) Fix unexpected `nil` values for `reward`, returned by `EffectiveGasTipValue(blockBaseFee)` in the `eth_feeHistory` RPC method.
 * (evm) [\#529](https://github.com/tharsis/ethermint/issues/529) Add support return value on trace tx response.
 * (rpc) [#970] (https://github.com/tharsis/ethermint/pull/970) Fix unexpected nil reward values on `eth_feeHistory` response
 
diff --git a/rpc/ethereum/backend/feebackend.go b/rpc/ethereum/backend/feebackend.go
index b09b5d42..ed44833a 100644
--- a/rpc/ethereum/backend/feebackend.go
+++ b/rpc/ethereum/backend/feebackend.go
@@ -87,6 +87,9 @@ func (e *EVMBackend) processBlock(
 			}
 			tx := ethMsg.AsTransaction()
 			reward := tx.EffectiveGasTipValue(blockBaseFee)
+			if reward == nil {
+				reward = big.NewInt(0)
+			}
 			sorter[i] = txGasAndReward{gasUsed: txGasUsed, reward: reward}
 			break
 		}