diff --git a/app/scodoc/sco_cache.py b/app/scodoc/sco_cache.py
index 53a26d77..9c20a213 100644
--- a/app/scodoc/sco_cache.py
+++ b/app/scodoc/sco_cache.py
@@ -46,9 +46,9 @@
 #  sco_cache.NotesTableCache.delete_many(formsemestre_id_list)
 #
 # Bulletins PDF:
-#  sco_cache.PDFBulCache.get(formsemestre_id, version)
-#  sco_cache.PDFBulCache.set(formsemestre_id, version, filename, pdfdoc)
-#  sco_cache.PDFBulCache.delete(formsemestre_id) suppr. toutes les versions
+#  sco_cache.SemBulletinsPDFCache.get(formsemestre_id, version)
+#  sco_cache.SemBulletinsPDFCache.set(formsemestre_id, version, filename, pdfdoc)
+#  sco_cache.SemBulletinsPDFCache.delete(formsemestre_id) suppr. toutes les versions
 
 # Evaluations:
 #  sco_cache.EvaluationCache.get(evaluation_id), set(evaluation_id, value), delete(evaluation_id),
diff --git a/app/scodoc/sco_preferences.py b/app/scodoc/sco_preferences.py
index 92b00a67..d83ca14f 100644
--- a/app/scodoc/sco_preferences.py
+++ b/app/scodoc/sco_preferences.py
@@ -1894,21 +1894,9 @@ class BasePreferences(object):
         """Returns preference value.
         when no value defined for this semestre, returns global value.
         """
-        params = {
-            "dept_id": self.dept_id,
-            "name": name,
-            "formsemestre_id": formsemestre_id,
-        }
-        cnx = ndb.GetDBConnexion()
-        plist = self._editor.list(cnx, params)
-        if not plist:
-            params["formsemestre_id"] = None
-            plist = self._editor.list(cnx, params)
-            if not plist:
-                return self.default[name]
-        p = plist[0]
-        _convert_pref_type(p, self.prefs_dict[name])
-        return p["value"]
+        if formsemestre_id in self.prefs:
+            return self.prefs[formsemestre_id].get(name, self.prefs[None][name])
+        return self.prefs[None][name]
 
     def __contains__(self, item):
         return item in self.prefs[None]