diff --git a/islandora.module b/islandora.module
index 7fb3b477..ebf7f916 100644
--- a/islandora.module
+++ b/islandora.module
@@ -1240,7 +1240,7 @@ function islandora_islandora_required_objects(IslandoraTuque $connection) {
  * Implements hook_islandora_undeleteable_datastreams().
  */
 function islandora_islandora_undeletable_datastreams(array $models) {
-  return array('DC');
+  return array('DC', 'RELS-EXT');
 }
 
 /**