diff --git a/core/chain_makers_test.go b/core/chain_makers_test.go
index a2ec9e6507..bfd8a145fe 100644
--- a/core/chain_makers_test.go
+++ b/core/chain_makers_test.go
@@ -43,7 +43,7 @@ func TestGeneratePOSChain(t *testing.T) {
 		bb      = common.Address{0xbb}
 		funds   = big.NewInt(0).Mul(big.NewInt(1337), big.NewInt(params.Ether))
 		config  = *params.AllEthashProtocolChanges
-		asm4788 = common.Hex2Bytes("3373fffffffffffffffffffffffffffffffffffffffe14604d57602036146024575f5ffd5b5f35801560495762001fff810690815414603c575f5ffd5b62001fff01545f5260205ff35b5f5ffd5b62001fff42064281555f359062001fff015500")
+		asm4788 = params.BeaconRootsCode
 		gspec   = &Genesis{
 			Config: &config,
 			Alloc: types.GenesisAlloc{
diff --git a/params/protocol_params.go b/params/protocol_params.go
index 55661c3750..9c3b49910c 100644
--- a/params/protocol_params.go
+++ b/params/protocol_params.go
@@ -188,7 +188,7 @@ var (
 	BeaconRootsAddress = common.HexToAddress("0x000F3df6D732807Ef1319fB7B8bB8522d0Beac02")
 
 	// BeaconRootsCode is the code where historical beacon roots are stored as per EIP-4788
-	BeaconRootsCode = []byte("3373fffffffffffffffffffffffffffffffffffffffe14604d57602036146024575f5ffd5b5f35801560495762001fff810690815414603c575f5ffd5b62001fff01545f5260205ff35b5f5ffd5b62001fff42064281555f359062001fff015500")
+	BeaconRootsCode = common.FromHex("3373fffffffffffffffffffffffffffffffffffffffe14604d57602036146024575f5ffd5b5f35801560495762001fff810690815414603c575f5ffd5b62001fff01545f5260205ff35b5f5ffd5b62001fff42064281555f359062001fff015500")
 	
 	// SystemAddress is where the system-transaction is sent from as per EIP-4788
 	SystemAddress = common.HexToAddress("0xfffffffffffffffffffffffffffffffffffffffe")