diff --git a/core/state_transition_ovm.go b/core/state_transition_ovm.go
index 5a51cb2f9..a22ac16b1 100644
--- a/core/state_transition_ovm.go
+++ b/core/state_transition_ovm.go
@@ -98,7 +98,7 @@ func asOvmMessage(tx *types.Transaction, signer types.Signer, decompressor commo
 	// inserting into Geth so we can make transactions easily parseable. However, this means that
 	// we need to re-encode the transactions before executing them.
 	var data = new(bytes.Buffer)
-	data.WriteByte(getSignatureType(msg))                    // 1 byte: 00 == EIP 155, 02 == ETH Sign Message
+	data.WriteByte(uint8(msg.SignatureHashType()))           // 1 byte: 00 == EIP 155, 01 == ETH Sign Message
 	data.Write(fillBytes(r, 32))                             // 32 bytes: Signature `r` parameter
 	data.Write(fillBytes(s, 32))                             // 32 bytes: Signature `s` parameter
 	data.Write(fillBytes(v, 1))                              // 1 byte: Signature `v` parameter
@@ -180,18 +180,6 @@ func modMessage(
 	return outmsg, nil
 }
 
-func getSignatureType(
-	msg Message,
-) uint8 {
-	if msg.SignatureHashType() == 0 {
-		return 0
-	} else if msg.SignatureHashType() == 1 {
-		return 2
-	} else {
-		return 1
-	}
-}
-
 func getQueueOrigin(
 	queueOrigin *big.Int,
 ) (types.QueueOrigin, error) {
diff --git a/rollup/types.go b/rollup/types.go
index 78ea2e968..f8d7dd61e 100644
--- a/rollup/types.go
+++ b/rollup/types.go
@@ -243,8 +243,8 @@ type CTCTransactionType uint8
 
 const (
 	CTCTransactionTypeEIP155  CTCTransactionType = 0
-	CTCTransactionTypeEOA     CTCTransactionType = 1
-	CTCTransactionTypeEthSign CTCTransactionType = 2
+	CTCTransactionTypeEthSign CTCTransactionType = 1
+	CTCTransactionTypeEOA     CTCTransactionType = 2
 )
 
 type CTCTransaction struct {