diff --git a/common/types.go b/common/types.go
index a914828..3147976 100644
--- a/common/types.go
+++ b/common/types.go
@@ -41,10 +41,6 @@ func BytesToAddress(b []byte) (a Address) {
 	return
 }
 
-func (p Address) Equals(pb Address) bool {
-	return p == pb
-}
-
 // BigToAddress returns Address with byte values of b.
 func BigToAddress(b *big.Int) Address { return BytesToAddress(b.Bytes()) }
 
diff --git a/types/transaction.go b/types/transaction.go
index d66b889..a435611 100644
--- a/types/transaction.go
+++ b/types/transaction.go
@@ -330,7 +330,7 @@ func (tx *Transaction) Sign(accounts []crypto.Account) (err error) {
 signerMatch:
 	for _, key := range signerKeys {
 		for _, signer := range accounts {
-			if key.Equals(signer.Address) {
+			if key == signer.Address {
 				s := signer.Sign(messageContent)
 				tx.Signatures = append(tx.Signatures, common.BytesToSignature(s))
 				continue signerMatch