diff --git a/templates/smb.conf.j2 b/templates/smb.conf.j2
old mode 100644
new mode 100755
index 355344e..9e97b9c
--- a/templates/smb.conf.j2
+++ b/templates/smb.conf.j2
@@ -23,7 +23,9 @@
   security = {{ samba_security }}
   passdb backend = {{ samba_passdb_backend }}
   map to guest = {{ samba_map_to_guest }}
+{% if samba_guest_account  is defined %}
   guest account = {{ samba_guest_account }}
+{% endif %}
 
 {% if samba_interfaces|length > 0 %}
   interfaces = {{ samba_interfaces }}