diff --git a/crypto/ecies/ecies.go b/crypto/ecies/ecies.go
index 1474181482..7df3d2618a 100644
--- a/crypto/ecies/ecies.go
+++ b/crypto/ecies/ecies.go
@@ -169,9 +169,8 @@ func concatKDF(hash hash.Hash, z, s1 []byte, kdLen int) (k []byte, err error) {
 		s1 = make([]byte, 0)
 	}
 
-	reps := ((kdLen + 7) * 8) / (hash.BlockSize() * 8)
+	reps := ((kdLen + 7) * 8) / (hash.Size() * 8)
 	if big.NewInt(int64(reps)).Cmp(big2To32M1) > 0 {
-		fmt.Println(big2To32M1)
 		return nil, ErrKeyDataTooLong
 	}