diff --git a/crypto/ecies/ecies.go b/crypto/ecies/ecies.go
index 1474181482..ffc8d06cbb 100644
--- a/crypto/ecies/ecies.go
+++ b/crypto/ecies/ecies.go
@@ -307,7 +307,7 @@ func (prv *PrivateKey) Decrypt(c, s1, s2 []byte) (m []byte, err error) {
 
 	var (
 		rLen   int
-		hLen   int = hash.Size()
+		hLen   = hash.Size()
 		mStart int
 		mEnd   int
 	)