diff --git a/app/scodoc/sco_bulletins_xml.py b/app/scodoc/sco_bulletins_xml.py
index 982ace4e..fc3cda44 100644
--- a/app/scodoc/sco_bulletins_xml.py
+++ b/app/scodoc/sco_bulletins_xml.py
@@ -376,9 +376,9 @@ def make_xml_formsemestre_bulletinetud(
                         "decision",
                         code=code,
                         etat=str(etat),
-                        compense_formsemestre_id=decision["decision_sem"][
-                            "compense_formsemestre_id"
-                        ],
+                        compense_formsemestre_id=str(
+                            decision["decision_sem"]["compense_formsemestre_id"] or ""
+                        ),
                     )
                 )
             else: