diff --git a/capsul/engine/database.py b/capsul/engine/database.py
index b9d10400..521b6cea 100644
--- a/capsul/engine/database.py
+++ b/capsul/engine/database.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 import os.path as osp
 
 class DatabaseEngine:
diff --git a/capsul/engine/database_populse.py b/capsul/engine/database_populse.py
index 010aab27..2e4b855e 100644
--- a/capsul/engine/database_populse.py
+++ b/capsul/engine/database_populse.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 import os.path as osp
 
 from capsul.engine.database import DatabaseEngine