diff --git a/modoboa/admin/__init__.py b/modoboa/admin/__init__.py
index 48f615831..5ebe1de28 100644
--- a/modoboa/admin/__init__.py
+++ b/modoboa/admin/__init__.py
@@ -13,7 +13,7 @@ class AdminConsole(ModoExtension):
 
     def load(self):
         from app_settings import GeneralParametersForm
-        parameters.register(GeneralParametersForm, _("General"))
+        parameters.register(GeneralParametersForm, ugettext_lazy("General"))
 
     def destroy(self):
         parameters.unregister()
diff --git a/modoboa/extensions/amavis/__init__.py b/modoboa/extensions/amavis/__init__.py
index 5537ec26e..1333f3b6e 100644
--- a/modoboa/extensions/amavis/__init__.py
+++ b/modoboa/extensions/amavis/__init__.py
@@ -42,7 +42,7 @@ class Amavis(ModoExtension):
     def load(self):
         from app_settings import ParametersForm, UserSettings
         parameters.register(ParametersForm, "Amavis")
-        parameters.register(UserSettings, _("Quarantine"))
+        parameters.register(UserSettings, ugettext_lazy("Quarantine"))
        
     def destroy(self):
         events.unregister("UserMenuDisplay", menu)
diff --git a/modoboa/extensions/limits/__init__.py b/modoboa/extensions/limits/__init__.py
index 5bf1c9c33..1b57fd5b7 100644
--- a/modoboa/extensions/limits/__init__.py
+++ b/modoboa/extensions/limits/__init__.py
@@ -7,7 +7,7 @@ The *limits* extension
 from django.contrib.auth.models import Permission, Group
 from django.db import IntegrityError
 from django.contrib.contenttypes.models import ContentType
-from django.utils.translation import ugettext as _
+from django.utils.translation import ugettext as _, ugettext_lazy
 from django.core.urlresolvers import reverse
 from modoboa.lib import events, parameters
 from modoboa.extensions import ModoExtension, exts_pool
@@ -51,7 +51,7 @@ class Limits(ModoExtension):
 
     def load(self):
         from app_settings import ParametersForm
-        parameters.register(ParametersForm, _("Limits"))
+        parameters.register(ParametersForm, ugettext_lazy("Limits"))
 
     def destroy(self):
         parameters.unregister()
diff --git a/modoboa/extensions/postfix_autoreply/__init__.py b/modoboa/extensions/postfix_autoreply/__init__.py
index acecc9618..8ef596627 100644
--- a/modoboa/extensions/postfix_autoreply/__init__.py
+++ b/modoboa/extensions/postfix_autoreply/__init__.py
@@ -38,7 +38,7 @@ class PostfixAutoreply(ModoExtension):
 
     def load(self):
         from app_settings import ParametersForm
-        parameters.register(ParametersForm, _("Automatic replies"))
+        parameters.register(ParametersForm, ugettext_lazy("Automatic replies"))
 
     def destroy(self):
         events.unregister("CreateDomain", onCreateDomain)
diff --git a/modoboa/extensions/sievefilters/__init__.py b/modoboa/extensions/sievefilters/__init__.py
index ca670cd07..01c20a5bf 100644
--- a/modoboa/extensions/sievefilters/__init__.py
+++ b/modoboa/extensions/sievefilters/__init__.py
@@ -14,8 +14,8 @@ class SieveFilters(ModoExtension):
 
     def load(self):
         from app_settings import ParametersForm, UserSettings
-        parameters.register(ParametersForm, _("Sieve filters"))
-        parameters.register(UserSettings, _("Message filters"))
+        parameters.register(ParametersForm, ugettext_lazy("Sieve filters"))
+        parameters.register(UserSettings, ugettext_lazy("Message filters"))
 
     def destroy(self):
         events.unregister("UserMenuDisplay", menu)
diff --git a/modoboa/lib/formutils.py b/modoboa/lib/formutils.py
index 64a428e8e..37ec8144c 100644
--- a/modoboa/lib/formutils.py
+++ b/modoboa/lib/formutils.py
@@ -1,6 +1,6 @@
 # coding: utf-8
 import re
-from django.utils.translation import ugettext as _
+from django.utils.translation import ugettext as _, ugettext_lazy
 from django.forms.widgets import RadioSelect, RadioInput
 from django.forms.fields import CharField, Field, ChoiceField
 from django.core.exceptions import ValidationError
@@ -203,6 +203,6 @@ class SeparatorField(Field):
 
 class YesNoField(ChoiceField):
     def __init__(self, *args, **kwargs):
-        kwargs["choices"] = [("yes", _("Yes")), ("no", _("No"))]
+        kwargs["choices"] = [("yes", ugettext_lazy("Yes")), ("no", ugettext_lazy("No"))]
         kwargs["widget"] = InlineRadioSelect
         super(YesNoField, self).__init__(*args, **kwargs)