diff --git a/auquotidien/modules/abelium_domino_vars.py b/auquotidien/modules/abelium_domino_vars.py
index 1f3b902..7a5178c 100644
--- a/auquotidien/modules/abelium_domino_vars.py
+++ b/auquotidien/modules/abelium_domino_vars.py
@@ -15,9 +15,14 @@ class DominoVariables(object):
     VARIABLE_TEMPLATE = 'domino_var_%s'
     CHILD_VARIABLE_TEMPLATE = 'domino_var_%s_enfant%s'
 
-    CHILD_COLUMNS = abelium_domino_ws.Child.COLUMNS
-    FAMILY_COLUMNS = abelium_domino_ws.Family.COLUMNS \
-        + abelium_domino_ws.Family.MORE_COLUMNS
+    @classmethod
+    def CHILD_COLUMNS(cls):
+        return abelium_domino_ws.Child.COLUMNS
+
+    @classmethod
+    def FAMILY_COLUMNS(cls):
+        return abelium_domino_ws.Family.COLUMNS + abelium_domino_ws.Family.MORE_COLUMNS
+
     def __init__(self, publisher=None, request=None):
         self.publisher = publisher
         self.request = request
@@ -39,7 +44,7 @@ class DominoVariables(object):
             if family:
                 family.complete()
                 for i, child in enumerate(family.children):
-                    for remote_name, name, converter, desc in self.CHILD_COLUMNS:
+                    for remote_name, name, converter, desc in self.CHILD_COLUMNS():
                         v = getattr(child, name, None)
                         if v is None:
                             continue
@@ -47,7 +52,7 @@ class DominoVariables(object):
                             v = v.encode(charset)
                         vars[self.CHILD_VARIABLE_TEMPLATE % (name, i+1)] = v
                 vars[self.VARIABLE_TEMPLATE % 'nombre_enfants'] = len(family.children)
-                for remote_name, name, converted, desc in self.FAMILY_COLUMNS:
+                for remote_name, name, converted, desc in self.FAMILY_COLUMNS():
                     if hasattr(family, name):
                         v = getattr(family, name)
                         if v is None:
@@ -70,9 +75,9 @@ class DominoVariables(object):
         if not is_activated():
             return ()
         vars = []
-        for remote_name, name, converted, desc in cls.FAMILY_COLUMNS:
+        for remote_name, name, converted, desc in cls.FAMILY_COLUMNS():
             vars.append((_('Domino'), cls.VARIABLE_TEMPLATE % name, desc))
-        for remote_name, name, converted, desc in cls.CHILD_COLUMNS:
+        for remote_name, name, converted, desc in cls.CHILD_COLUMNS():
             vars.append((_('Domino'), cls.CHILD_VARIABLE_TEMPLATE % (name, '{0,1,2,..}'), desc))
         return vars
     get_substitution_variables_list = classmethod(get_substitution_variables_list)