diff --git a/src/lib/y2storage/mountable.rb b/src/lib/y2storage/mountable.rb
index 8cf5969741..7531950d86 100644
--- a/src/lib/y2storage/mountable.rb
+++ b/src/lib/y2storage/mountable.rb
@@ -93,6 +93,8 @@ def mountpoint=(path)
     # @return [Boolean] true if the mount point is saved to /etc/fstab
     #   (and will be mounted at boot again), false otherwise
     def persistent?
+      # TODO: this implementation needs to be adapted after adding the Y2Storage
+      # wrapper for Storage::MountPoint
       to_storage_value.has_mount_point && to_storage_value.mount_point.in_etc_fstab?
     end