diff --git a/app/scodoc/sco_assiduites.py b/app/scodoc/sco_assiduites.py
index 40da4a9ff..23252ddb5 100644
--- a/app/scodoc/sco_assiduites.py
+++ b/app/scodoc/sco_assiduites.py
@@ -516,12 +516,9 @@ def filter_by_formsemestre(
         .filter(FormSemestreInscription.formsemestre_id == formsemestre.id)
     )
 
-    form_date_debut = formsemestre.date_debut + timedelta(days=1)
-    form_date_fin = formsemestre.date_fin + timedelta(days=1)
-
     collection_result = collection_result.filter(
-        collection_class.date_debut <= form_date_fin
-    ).filter(collection_class.date_fin >= form_date_debut)
+        collection_class.date_debut <= formsemestre.date_fin
+    ).filter(collection_class.date_fin >= formsemestre.date_debut)
 
     return collection_result