diff --git a/pykolab/setup/setup_mysql.py b/pykolab/setup/setup_mysql.py
--- a/pykolab/setup/setup_mysql.py
+++ b/pykolab/setup/setup_mysql.py
@@ -256,7 +256,7 @@
 
 
     fp = open('/tmp/kolab-setup-my.cnf', 'w')
-    os.chmod('/tmp/kolab-setup-my.cnf', 600)
+    os.chmod('/tmp/kolab-setup-my.cnf', 0600)
     fp.write(data)
     fp.close()
 
diff --git a/pykolab/setup/setup_roundcube.py b/pykolab/setup/setup_roundcube.py
--- a/pykolab/setup/setup_roundcube.py
+++ b/pykolab/setup/setup_roundcube.py
@@ -259,7 +259,7 @@
 """ % (mysql_root_password, conf.mysqlhost)
 
         fp = open('/tmp/kolab-setup-my.cnf', 'w')
-        os.chmod('/tmp/kolab-setup-my.cnf', 600)
+        os.chmod('/tmp/kolab-setup-my.cnf', 0600)
         fp.write(data)
         fp.close()