diff --git a/weed/command/server.go b/weed/command/server.go
index 622f5d447..626bc0855 100644
--- a/weed/command/server.go
+++ b/weed/command/server.go
@@ -76,7 +76,6 @@ var (
 	volumeFixJpgOrientation       = cmdServer.Flag.Bool("volume.images.fix.orientation", true, "Adjust jpg orientation when uploading.")
 	volumeReadRedirect            = cmdServer.Flag.Bool("volume.read.redirect", true, "Redirect moved or non-local volumes.")
 	volumeServerPublicUrl         = cmdServer.Flag.String("volume.publicUrl", "", "publicly accessible address")
-	volumeEnableBytesCache        = cmdServer.Flag.Bool("volume.cache.enable", false, "direct cache instead of OS cache, cost more memory.")
 	isStartingFiler               = cmdServer.Flag.Bool("filer", false, "whether to start filer")
 
 	serverWhiteList []string