diff --git a/islandora.install b/islandora.install
index fe04c0e2..d993f80c 100644
--- a/islandora.install
+++ b/islandora.install
@@ -58,6 +58,7 @@ function islandora_uninstall() {
     'islandora_use_object_semaphores',
     'islandora_semaphore_period',
     'islandora_require_obj_upload',
+    'islandora_breadcrumbs_backends',
   );
   array_walk($variables, 'variable_del');
 }