diff --git a/app/scodoc/sco_saisie_notes.py b/app/scodoc/sco_saisie_notes.py
index d0a5407ddf..9ccbd9c8d7 100644
--- a/app/scodoc/sco_saisie_notes.py
+++ b/app/scodoc/sco_saisie_notes.py
@@ -153,7 +153,10 @@ def _check_notes(notes, evaluation, mod):
 
     for (etudid, note) in notes:
         note = str(note).strip().upper()
-        etudid = int(etudid)  #
+        try:
+            etudid = int(etudid)  #
+        except ValueError as exc:
+            raise ScoValueError(f"Code étudiant ({etudid}) invalide")
         if note[:3] == "DEM":
             continue  # skip !
         if note: