diff --git a/archive.go b/archive.go
index 5fc36c0..33464a1 100644
--- a/archive.go
+++ b/archive.go
@@ -33,7 +33,7 @@ type logfileinfo struct {
 func SetLogFile(path string, logger *StarLogger, appendMode bool) error {
 	var fileMode int
 	if appendMode {
-		fileMode = os.O_APPEND | os.O_CREATE
+		fileMode = os.O_APPEND | os.O_CREATE | os.O_WRONLY
 	} else {
 		fileMode = os.O_CREATE | os.O_WRONLY
 	}
@@ -83,7 +83,7 @@ func SetLogFile(path string, logger *StarLogger, appendMode bool) error {
 func CloseWithSwitching(logger *StarLogger) error {
 	if archMap.MustGet(logger.logcore.id) != nil {
 		logger.SetSwitching(true)
-		err := archMap.MustGet(logger.logcore.id).(*os.File).Close()
+		err := archMap.MustGet(logger.logcore.id).(logfileinfo).pointer.Close()
 		if err != nil {
 			logger.logcore.output = nil
 			return err