diff --git a/node/impl/full/eth.go b/node/impl/full/eth.go
index 907adf8cd..7af9e7000 100644
--- a/node/impl/full/eth.go
+++ b/node/impl/full/eth.go
@@ -153,6 +153,8 @@ type EthAPI struct {
 	EthEventAPI
 }
 
+var ErrNullRound = errors.New("requested epoch was a null round")
+
 func (a *EthModule) StateNetworkName(ctx context.Context) (dtypes.NetworkName, error) {
 	return stmgr.GetNetworkName(ctx, a.StateManager, a.Chain.GetHeaviestTipSet().ParentState())
 }
@@ -231,7 +233,7 @@ func (a *EthModule) EthGetBlockByHash(ctx context.Context, blkHash ethtypes.EthH
 	return newEthBlockFromFilecoinTipSet(ctx, ts, fullTxInfo, a.Chain, a.StateAPI)
 }
 
-func (a *EthModule) parseBlkParam(ctx context.Context, blkParam string) (tipset *types.TipSet, err error) {
+func (a *EthModule) parseBlkParam(ctx context.Context, blkParam string, strict bool) (tipset *types.TipSet, err error) {
 	if blkParam == "earliest" {
 		return nil, fmt.Errorf("block param \"earliest\" is not supported")
 	}
@@ -252,16 +254,19 @@ func (a *EthModule) parseBlkParam(ctx context.Context, blkParam string) (tipset
 		if err != nil {
 			return nil, fmt.Errorf("cannot parse block number: %v", err)
 		}
-		ts, err := a.Chain.GetTipsetByHeight(ctx, abi.ChainEpoch(num), nil, false)
+		ts, err := a.Chain.GetTipsetByHeight(ctx, abi.ChainEpoch(num), nil, true)
 		if err != nil {
 			return nil, fmt.Errorf("cannot get tipset at height: %v", num)
 		}
+		if strict && ts.Height() != abi.ChainEpoch(num) {
+			return nil, ErrNullRound
+		}
 		return ts, nil
 	}
 }
 
 func (a *EthModule) EthGetBlockByNumber(ctx context.Context, blkParam string, fullTxInfo bool) (ethtypes.EthBlock, error) {
-	ts, err := a.parseBlkParam(ctx, blkParam)
+	ts, err := a.parseBlkParam(ctx, blkParam, true)
 	if err != nil {
 		return ethtypes.EthBlock{}, err
 	}
@@ -367,7 +372,7 @@ func (a *EthModule) EthGetTransactionCount(ctx context.Context, sender ethtypes.
 		return ethtypes.EthUint64(0), nil
 	}
 
-	ts, err := a.parseBlkParam(ctx, blkParam)
+	ts, err := a.parseBlkParam(ctx, blkParam, false)
 	if err != nil {
 		return ethtypes.EthUint64(0), xerrors.Errorf("cannot parse block param: %s", blkParam)
 	}
@@ -456,7 +461,7 @@ func (a *EthModule) EthGetCode(ctx context.Context, ethAddr ethtypes.EthAddress,
 		return nil, xerrors.Errorf("cannot get Filecoin address: %w", err)
 	}
 
-	ts, err := a.parseBlkParam(ctx, blkParam)
+	ts, err := a.parseBlkParam(ctx, blkParam, false)
 	if err != nil {
 		return nil, xerrors.Errorf("cannot parse block param: %s", blkParam)
 	}
@@ -535,7 +540,7 @@ func (a *EthModule) EthGetCode(ctx context.Context, ethAddr ethtypes.EthAddress,
 }
 
 func (a *EthModule) EthGetStorageAt(ctx context.Context, ethAddr ethtypes.EthAddress, position ethtypes.EthBytes, blkParam string) (ethtypes.EthBytes, error) {
-	ts, err := a.parseBlkParam(ctx, blkParam)
+	ts, err := a.parseBlkParam(ctx, blkParam, false)
 	if err != nil {
 		return nil, xerrors.Errorf("cannot parse block param: %s", blkParam)
 	}
@@ -631,7 +636,7 @@ func (a *EthModule) EthGetBalance(ctx context.Context, address ethtypes.EthAddre
 		return ethtypes.EthBigInt{}, err
 	}
 
-	ts, err := a.parseBlkParam(ctx, blkParam)
+	ts, err := a.parseBlkParam(ctx, blkParam, false)
 	if err != nil {
 		return ethtypes.EthBigInt{}, xerrors.Errorf("cannot parse block param: %s", blkParam)
 	}
@@ -676,7 +681,7 @@ func (a *EthModule) EthFeeHistory(ctx context.Context, p jsonrpc.RawParams) (eth
 		}
 	}
 
-	ts, err := a.parseBlkParam(ctx, params.NewestBlkNum)
+	ts, err := a.parseBlkParam(ctx, params.NewestBlkNum, false)
 	if err != nil {
 		return ethtypes.EthFeeHistory{}, fmt.Errorf("bad block parameter %s: %s", params.NewestBlkNum, err)
 	}
@@ -1066,7 +1071,7 @@ func (a *EthModule) EthCall(ctx context.Context, tx ethtypes.EthCall, blkParam s
 		return nil, xerrors.Errorf("failed to convert ethcall to filecoin message: %w", err)
 	}
 
-	ts, err := a.parseBlkParam(ctx, blkParam)
+	ts, err := a.parseBlkParam(ctx, blkParam, false)
 	if err != nil {
 		return nil, xerrors.Errorf("cannot parse block param: %s", blkParam)
 	}