diff --git a/registry/handlers/manifests.go b/registry/handlers/manifests.go
index 8b365c70..5af59aaf 100644
--- a/registry/handlers/manifests.go
+++ b/registry/handlers/manifests.go
@@ -492,13 +492,14 @@ func (imh *manifestHandler) DeleteManifest(w http.ResponseWriter, r *http.Reques
 	}
 
 	if imh.Tag != "" {
+		dcontext.GetLogger(imh).Debug("DeleteImageTag")
 		tagService := imh.Repository.Tags(imh.Context)
 		if err := tagService.Untag(imh.Context, imh.Tag); err != nil {
 			switch err.(type) {
 			case distribution.ErrTagUnknown, driver.PathNotFoundError:
-				imh.Errors = append(imh.Errors, v2.ErrorCodeManifestUnknown)
+				imh.Errors = append(imh.Errors, v2.ErrorCodeManifestUnknown.WithDetail(err))
 			default:
-				imh.Errors = append(imh.Errors, errcode.ErrorCodeUnknown)
+				imh.Errors = append(imh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
 			}
 			return
 		}