diff --git a/auth_ldap.go b/auth_ldap.go
index 9164e93..bf2a9fb 100644
--- a/auth_ldap.go
+++ b/auth_ldap.go
@@ -101,7 +101,7 @@ func (l *ldapConnector) profile() (*ldap.Entry, error) {
 	}
 
 	if len(sr.Entries) != 1 {
-		return nil, errors.New(fmt.Sprintf("Wrong number of LDAP entries, expected 1, got", len(sr.Entries)))
+		return nil, errors.New(fmt.Sprintf("Wrong number of LDAP entries, expected 1, got %d", len(sr.Entries)))
 	}
 
 	return sr.Entries[0], nil
diff --git a/s3_fs.go b/s3_fs.go
index ecade9f..923240e 100644
--- a/s3_fs.go
+++ b/s3_fs.go
@@ -3,7 +3,10 @@ package main
 import (
 	"context"
 	"errors"
+	"io"
 	"os"
+	"path"
+	"strings"
 	"time"
 
 	"github.com/minio/minio-go/v7"
@@ -30,7 +33,14 @@ func NewS3FS(mc *minio.Client) S3FS {
 
 func (s S3FS) Mkdir(ctx context.Context, name string, perm os.FileMode) error {
 	s.ctx = ctx
-	return errors.New("Not implemented Mkdir")
+	f, err := NewS3File(&s, path.Join(name, ".bagage"))
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	_, err = io.Copy(f, strings.NewReader("This is a placeholder"))
+	return nil
 }
 
 func (s S3FS) OpenFile(ctx context.Context, name string, flag int, perm os.FileMode) (webdav.File, error) {