diff --git a/app/models/validations.py b/app/models/validations.py
index 17dd12a6..e9796876 100644
--- a/app/models/validations.py
+++ b/app/models/validations.py
@@ -126,7 +126,7 @@ class ScolarFormSemestreValidation(db.Model):
     def ects(self) -> float:
         "Les ECTS acquis par cette validation. (0 si ce n'est pas une validation d'UE)"
         return (
-            self.ue.ects
+            self.ue.ects or 0.0
             if (self.ue is not None) and (self.code in CODES_UE_VALIDES)
             else 0.0
         )