diff --git a/app/models/modules.py b/app/models/modules.py
index b5f90c788..d0b159b7a 100644
--- a/app/models/modules.py
+++ b/app/models/modules.py
@@ -226,7 +226,9 @@ class Module(models.ScoDocModel):
             else:
                 d["parcours"] = [p.to_dict() for p in self.parcours]
             d["ue_coefs"] = [
-                c.to_dict(convert_objects=convert_objects) for c in self.ue_coefs
+                c.to_dict(convert_objects=False)
+                for c in self.ue_coefs
+                # note: don't convert_objects: we do wan't the details of the UEs here
             ]
             d["app_critiques"] = {x.code: x.to_dict() for x in self.app_critiques}
         if not with_matiere: