diff --git a/modoboa/demo/views.py b/modoboa/demo/views.py
index 8016e4627..19b9e14ea 100755
--- a/modoboa/demo/views.py
+++ b/modoboa/demo/views.py
@@ -20,7 +20,7 @@ def send_virus(request):
 @login_required
 @needs_mailbox()
 def send_spam(request):
-    status, error = sendmail_simple("spam@example.net", request.user.username, """
+    status, error = sendmail_simple("spam@example.net", request.user.username, content="""
 This is the GTUBE, the
         Generic
         Test for