diff --git a/nameko-func.py b/nameko-func.py
index cc3012a..cdc4a3e 100644
--- a/nameko-func.py
+++ b/nameko-func.py
@@ -116,7 +116,8 @@ class CreateUser(object):
         w[0].homeDirectory = '/home/%s' % user
         # Set uidNumber as last used uidNumber+1
         w[0].uidNumber = self.get_new_uid_number(conn)
-        w[0].gidNumber = randint(1200,50000)
+        # gidNumber for users created by userservice, nice and clear
+        w[0].gidNumber = 10004
         if not w.commit():
             conn.unbind()
             self.dispatch('ldap', '%s [Error CreateUser] Could not write new user %s to LDAP DB\n' % (datetime.now(), dn) )