diff --git a/core/vm/address.go b/core/vm/address.go
index df801863fc..45c93e3119 100644
--- a/core/vm/address.go
+++ b/core/vm/address.go
@@ -82,7 +82,7 @@ func ecrecoverFunc(in []byte) []byte {
 	rsv := append(in[64:128], byte(v.Uint64()))
 	pubKey := crypto.Ecrecover(in[:32], rsv)
 	// make sure the public key is a valid one
-	if pubKey == nil || len(pubKey) != 65 {
+	if pubKey == nil {
 		return nil
 	}
 
diff --git a/crypto/crypto.go b/crypto/crypto.go
index 9a1559fbfb..37b6a38a6d 100644
--- a/crypto/crypto.go
+++ b/crypto/crypto.go
@@ -21,11 +21,16 @@ import (
 	"github.com/ethereum/go-ethereum/crypto/ecies"
 	"github.com/ethereum/go-ethereum/crypto/secp256k1"
 	"github.com/ethereum/go-ethereum/crypto/sha3"
+	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/rlp"
 	"golang.org/x/crypto/pbkdf2"
 	"golang.org/x/crypto/ripemd160"
 )
 
+var (
+	cryptologger = logger.NewLogger("CRYPTO")
+)
+
 func init() {
 	// specify the params for the s256 curve
 	ecies.AddParamsForCurve(S256(), ecies.ECIES_AES128_SHA256)
@@ -69,8 +74,10 @@ func Ripemd160(data []byte) []byte {
 }
 
 func Ecrecover(hash, sig []byte) []byte {
-	r, _ := secp256k1.RecoverPubkey(hash, sig)
-
+	r, err := secp256k1.RecoverPubkey(hash, sig)
+	if err != nil {
+		cryptologger.Errorf("EC RECOVER FAIL: ", err)
+	}
 	return r
 }