diff --git a/modoboa_installer/scripts/modoboa.py b/modoboa_installer/scripts/modoboa.py
index 912c469..ddefa7e 100644
--- a/modoboa_installer/scripts/modoboa.py
+++ b/modoboa_installer/scripts/modoboa.py
@@ -4,6 +4,7 @@ import os
 
 from .. import database
 from .. import python
+from .. import system
 from .. import utils
 
 from . import base