diff --git a/extensions/stats/views.py b/extensions/stats/views.py
index 7a1308214..c656a73d6 100644
--- a/extensions/stats/views.py
+++ b/extensions/stats/views.py
@@ -4,8 +4,7 @@ from django.http import HttpResponse
 from django.core.urlresolvers import reverse
 from django.utils.translation import ugettext as _
 from django.utils import simplejson
-from django.template.loader import render_to_string
-from modoboa.lib import _render, getctx
+from modoboa.lib import _render, _render_to_string, getctx
 from modoboa.admin.views import good_domain
 from modoboa.admin.models import Domain, Mailbox
 from django.contrib.auth.decorators \
@@ -79,7 +78,7 @@ def getgraph(request, dom_id):
             tplvars["start"] = start
             tplvars["end"] = end
     if ctx is None:
-        content = render_to_string("stats/graphs.html", tplvars)
+        content = _render_to_string(request, "stats/graphs.html", tplvars)
         ctx = getctx("ok", content=content)
 
     return HttpResponse(simplejson.dumps(ctx), mimetype="application/json")
diff --git a/lib/__init__.py b/lib/__init__.py
index b851d81af..b69a2a59d 100644
--- a/lib/__init__.py
+++ b/lib/__init__.py
@@ -20,6 +20,10 @@ def _render(request, tpl, user_context):
     return render_to_response(tpl, user_context, 
                               context_instance=RequestContext(request))
 
+def _render_to_string(request, tpl, user_context):
+    return render_to_string(tpl, user_context,
+                            context_instance=RequestContext(request))
+
 def _render_error(request, errortpl="error", user_context={}):
     return render_to_response("common/%s.html" % errortpl, user_context,
                               context_instance=RequestContext(request))
diff --git a/userprefs/views.py b/userprefs/views.py
index 3131dc7e4..6fc6e3d69 100644
--- a/userprefs/views.py
+++ b/userprefs/views.py
@@ -42,7 +42,7 @@ def changepassword(request):
         return HttpResponse(simplejson.dumps(ctx), mimetype="application/json")
 
     form = ChangePasswordForm(target)
-    return render_to_response('userprefs/chpassword.html', {
+    return _render(request, 'userprefs/chpassword.html', {
             "form" : form
             })
 
@@ -79,7 +79,7 @@ def savepreferences(request):
 
 @login_required
 def confirm(request):
-    return render_to_response('userprefs/confirm.html', {
+    return _render(request, 'userprefs/confirm.html', {
             "msg" : request.GET["question"]
             })