diff --git a/routers/private/manager.go b/routers/private/manager.go
index 26096c403..397e6fac7 100644
--- a/routers/private/manager.go
+++ b/routers/private/manager.go
@@ -155,7 +155,7 @@ func AddLogger(ctx *context.PrivateContext) {
 		writerOption := log.WriterFileOption{}
 		fileName, _ := opts.Config["filename"].(string)
 		writerOption.FileName = setting.LogPrepareFilenameForWriter(fileName, opts.Writer+".log")
-		writerOption.LogRotate = opts.Config["rotate"].(bool)
+		writerOption.LogRotate, _ = opts.Config["rotate"].(bool)
 		maxSizeShift, _ := opts.Config["maxsize"].(int)
 		if maxSizeShift == 0 {
 			maxSizeShift = 28