diff --git a/app/scodoc/sco_preferences.py b/app/scodoc/sco_preferences.py
index eb629edc9..85ab9ea46 100644
--- a/app/scodoc/sco_preferences.py
+++ b/app/scodoc/sco_preferences.py
@@ -2128,7 +2128,7 @@ class BasePreferences(object):
                     if formsemestre_id:
                         descr[
                             "explanation"
-                        ] = """ou <span class="spanlink"
+                        ] = f"""ou <span class="spanlink"
                             onclick="set_global_pref(this, '{pref_name}');"
                             >utiliser paramètre global</span>"""
                     if formsemestre_id and self.is_global(formsemestre_id, pref_name):