diff --git a/locker_redis.go b/locker_redis.go
index 3fe838c..a6d2c21 100644
--- a/locker_redis.go
+++ b/locker_redis.go
@@ -16,7 +16,7 @@ var txSetArgs redis.SetArgs = redis.SetArgs{
 }
 
 type LockerWithRedis struct {
-	key string
+	locked_key string
 }
 
 var ErrTransactionLocked = errors.New("transaction is already locked")
@@ -34,10 +34,10 @@ func (locker *LockerWithRedis) Lock(rc *redis.Client, key string) error {
 		return ErrTransactionLocked
 	}
 
-	locker.key = key
+	locker.locked_key = key
 	return nil
 }
 
 func (locker *LockerWithRedis) Unlock(rc *redis.Client) {
-	rc.Del(context.Background(), locker.key).Result()
+	rc.Del(context.Background(), locker.locked_key).Result()
 }