diff --git a/app/scodoc/sco_edit_ue.py b/app/scodoc/sco_edit_ue.py
index f36b33fc..2ad7798c 100644
--- a/app/scodoc/sco_edit_ue.py
+++ b/app/scodoc/sco_edit_ue.py
@@ -148,7 +148,7 @@ def can_delete_ue(ue: UniteEns) -> bool:
     et n'a pas de module rattachés
     """
     # "pas un seul module de cette UE n'a de modimpl...""
-    return (not len(ue.modules.all())) and not any(m.modimpls.all() for m in ue.modules)
+    return (ue.modules.count() == 0) and not any(m.modimpls.all() for m in ue.modules)
 
 
 def do_ue_delete(ue_id, delete_validations=False, force=False):