diff --git a/cmd/serve/s3/list.go b/cmd/serve/s3/list.go
index f58e95a87..559fa14a4 100644
--- a/cmd/serve/s3/list.go
+++ b/cmd/serve/s3/list.go
@@ -28,7 +28,8 @@ func (b *s3Backend) entryListR(_vfs *vfs.VFS, bucket, fdPath, name string, addPr
 
 		if entry.IsDir() {
 			if addPrefix {
-				response.AddPrefix(objectPath)
+				prefixWithTrailingSlash := objectPath + "/"
+				response.AddPrefix(prefixWithTrailingSlash)
 				continue
 			}
 			err := b.entryListR(_vfs, bucket, path.Join(fdPath, object), "", false, response)