diff --git a/app/scodoc/sco_edt_cal.py b/app/scodoc/sco_edt_cal.py
index 7f60dda93..eaa172a0f 100644
--- a/app/scodoc/sco_edt_cal.py
+++ b/app/scodoc/sco_edt_cal.py
@@ -55,6 +55,7 @@ def formsemestre_load_calendar(
     """Load ics data, return raw ics and decoded calendar.
     Raises ScoValueError if not configured or not available or invalid format.
     """
+    edt_ids = []
     if edt_id is None and formsemestre:
         edt_ids = formsemestre.get_edt_ids()
     if not edt_ids: