diff --git a/core/types/gen_header_json.go b/core/types/gen_header_json.go
index 0169b4366a..bd97819f5b 100644
--- a/core/types/gen_header_json.go
+++ b/core/types/gen_header_json.go
@@ -35,7 +35,7 @@ func (h Header) MarshalJSON() ([]byte, error) {
 		WithdrawalsHash *common.Hash    `json:"withdrawalsRoot" rlp:"optional"`
 		BlobGasUsed     *hexutil.Uint64 `json:"blobGasUsed" rlp:"optional"`
 		ExcessBlobGas   *hexutil.Uint64 `json:"excessBlobGas" rlp:"optional"`
-		BeaconRoot      *common.Hash    `json:"beaconRoot" rlp:"optional"`
+		BeaconRoot      *common.Hash    `json:"parentBeaconBlockRoot" rlp:"optional"`
 		Hash            common.Hash     `json:"hash"`
 	}
 	var enc Header
@@ -85,7 +85,7 @@ func (h *Header) UnmarshalJSON(input []byte) error {
 		WithdrawalsHash *common.Hash    `json:"withdrawalsRoot" rlp:"optional"`
 		BlobGasUsed     *hexutil.Uint64 `json:"blobGasUsed" rlp:"optional"`
 		ExcessBlobGas   *hexutil.Uint64 `json:"excessBlobGas" rlp:"optional"`
-		BeaconRoot      *common.Hash    `json:"beaconRoot" rlp:"optional"`
+		BeaconRoot      *common.Hash    `json:"parentBeaconBlockRoot" rlp:"optional"`
 	}
 	var dec Header
 	if err := json.Unmarshal(input, &dec); err != nil {