diff --git a/file_logger.go b/file_logger.go
index cc7a6d2..b232e5d 100644
--- a/file_logger.go
+++ b/file_logger.go
@@ -55,13 +55,7 @@ func NewFileLogger(lvl level.Level, logDir string, filePrefix string) (Logger, e
 
 // NewFileLoggerWithAutoFlush get a file logger
 func NewFileLoggerWithAutoFlush(lvl level.Level, logDir string, filePrefix string, autoFlush bool, flushInterval time.Duration) (Logger, error) {
-	return NewFileLoggerWithOption(option.FileLoggerOption{
-		Level:         lvl,
-		LogDir:        logDir,
-		FilePrefix:    filePrefix,
-		AutoFlush:     autoFlush,
-		FlushInterval: flushInterval,
-	})
+	return NewFileLoggerWithOption(option.NewFileLoggerOption(lvl, logDir, filePrefix, autoFlush, flushInterval, false))
 }
 
 // NewFileLoggerWithOption get a file logger with option
diff --git a/option/file_logger_option.go b/option/file_logger_option.go
index 49d3908..63ff33c 100644
--- a/option/file_logger_option.go
+++ b/option/file_logger_option.go
@@ -15,3 +15,15 @@ type FileLoggerOption struct {
 	FlushInterval time.Duration
 	SplitDate     bool
 }
+
+// NewFileLoggerOption returns an instance of the FileLoggerOption
+func NewFileLoggerOption(lvl level.Level, logDir string, filePrefix string, autoFlush bool, flushInterval time.Duration, splitDate bool) FileLoggerOption {
+	return FileLoggerOption{
+		Level:         lvl,
+		LogDir:        logDir,
+		FilePrefix:    filePrefix,
+		AutoFlush:     autoFlush,
+		FlushInterval: flushInterval,
+		SplitDate:     splitDate,
+	}
+}