diff --git a/cmd/mountlib/mount.go b/cmd/mountlib/mount.go
index 072b3afff..2a9f6fba6 100644
--- a/cmd/mountlib/mount.go
+++ b/cmd/mountlib/mount.go
@@ -1,6 +1,7 @@
 package mountlib
 
 import (
+	"context"
 	"log"
 	"os"
 	"path/filepath"
@@ -128,6 +129,10 @@ func NewMountCommand(commandName string, hidden bool, mount MountFn) *cobra.Comm
 		Run: func(command *cobra.Command, args []string) {
 			cmd.CheckArgs(2, 2, command, args)
 
+			if fs.GetConfig(context.Background()).UseListR {
+				fs.Logf(nil, "--fast-list does nothing on a mount")
+			}
+
 			if Opt.Daemon {
 				config.PassConfigKeyForDaemonization = true
 			}