diff --git a/chain/types/ethtypes/eth_types.go b/chain/types/ethtypes/eth_types.go
index b658b8856..35fed87d8 100644
--- a/chain/types/ethtypes/eth_types.go
+++ b/chain/types/ethtypes/eth_types.go
@@ -229,13 +229,25 @@ type EthCall struct {
 }
 
 func (c *EthCall) UnmarshalJSON(b []byte) error {
-	type TempEthCall EthCall
-	var params TempEthCall
+	type EthCallRaw EthCall // Avoid a recursive call.
+	type EthCallDecode struct {
+		// The field should be "input" by spec, but many clients use "data" so we support
+		// both, but prefer "input".
+		Input *EthBytes `json:"input"`
+		EthCallRaw
+	}
 
+	var params EthCallDecode
 	if err := json.Unmarshal(b, &params); err != nil {
 		return err
 	}
-	*c = EthCall(params)
+
+	// If input is specified, prefer it.
+	if params.Input != nil {
+		params.Data = *params.Input
+	}
+
+	*c = EthCall(params.EthCallRaw)
 	return nil
 }
 
diff --git a/chain/types/ethtypes/eth_types_test.go b/chain/types/ethtypes/eth_types_test.go
index 4a73184c2..2a1b2df55 100644
--- a/chain/types/ethtypes/eth_types_test.go
+++ b/chain/types/ethtypes/eth_types_test.go
@@ -194,11 +194,40 @@ func TestMaskedIDInF4(t *testing.T) {
 }
 
 func TestUnmarshalEthCall(t *testing.T) {
-	data := `{"from":"0x4D6D86b31a112a05A473c4aE84afaF873f632325","to":"0xFe01CC39f5Ae8553D6914DBb9dC27D219fa22D7f","gas":"0x5","gasPrice":"0x6","value":"0x123","data":""}`
+	data := `{"from":"0x4D6D86b31a112a05A473c4aE84afaF873f632325","to":"0xFe01CC39f5Ae8553D6914DBb9dC27D219fa22D7f","gas":"0x5","gasPrice":"0x6","value":"0x123","data":"0xFF"}`
 
 	var c EthCall
 	err := c.UnmarshalJSON([]byte(data))
 	require.Nil(t, err)
+	require.EqualValues(t, []byte{0xff}, c.Data)
+}
+
+func TestUnmarshalEthCallInput(t *testing.T) {
+	data := `{"from":"0x4D6D86b31a112a05A473c4aE84afaF873f632325","to":"0xFe01CC39f5Ae8553D6914DBb9dC27D219fa22D7f","gas":"0x5","gasPrice":"0x6","value":"0x123","input":"0xFF"}`
+
+	var c EthCall
+	err := c.UnmarshalJSON([]byte(data))
+	require.Nil(t, err)
+	require.EqualValues(t, []byte{0xff}, c.Data)
+}
+
+func TestUnmarshalEthCallInputAndData(t *testing.T) {
+	data := `{"from":"0x4D6D86b31a112a05A473c4aE84afaF873f632325","to":"0xFe01CC39f5Ae8553D6914DBb9dC27D219fa22D7f","gas":"0x5","gasPrice":"0x6","value":"0x123","data":"0xFE","input":"0xFF"}`
+
+	var c EthCall
+	err := c.UnmarshalJSON([]byte(data))
+	require.Nil(t, err)
+	require.EqualValues(t, []byte{0xff}, c.Data)
+}
+
+func TestUnmarshalEthCallInputAndDataEmpty(t *testing.T) {
+	// Even if the input is empty, it should be used when specified.
+	data := `{"from":"0x4D6D86b31a112a05A473c4aE84afaF873f632325","to":"0xFe01CC39f5Ae8553D6914DBb9dC27D219fa22D7f","gas":"0x5","gasPrice":"0x6","value":"0x123","data":"0xFE","input":""}`
+
+	var c EthCall
+	err := c.UnmarshalJSON([]byte(data))
+	require.Nil(t, err)
+	require.EqualValues(t, []byte{}, c.Data)
 }
 
 func TestUnmarshalEthBytes(t *testing.T) {