diff --git a/gestioncof/petits_cours_views.py b/gestioncof/petits_cours_views.py
index afb61011..589948e4 100644
--- a/gestioncof/petits_cours_views.py
+++ b/gestioncof/petits_cours_views.py
@@ -102,8 +102,9 @@ def _finalize_traitement(request, demande, proposals, proposed_for,
             'style="width:99%; height: 90px;">'
             '</textarea>'
     })
-    for error in errors:
-        messages.error(request, error)
+    if errors is not None:
+        for error in errors:
+            messages.error(request, error)
     return render(request, "gestioncof/traitement_demande_petit_cours.html",
                   {"demande": demande,
                    "unsatisfied": unsatisfied,