@@ -126,6 +126,11 @@ func (ldm *LayerDownloadManager) Download(ctx context.Context, initialRootFS ima

 					topLayer = l

 					missingLayer = false

 					rootFS.Append(diffID)

+					// Register this repository as a source of this layer.

+					withRegistered, hasRegistered := descriptor.(DownloadDescriptorWithRegistered)

+					if hasRegistered {

+						withRegistered.Registered(diffID)

+					}

 					continue

 				}

 			}