diff --git a/rootfs/etc/confd/templates/proftpd.conf.tmpl b/rootfs/etc/confd/templates/proftpd.conf.tmpl
index d25eec7..0c9488f 100644
--- a/rootfs/etc/confd/templates/proftpd.conf.tmpl
+++ b/rootfs/etc/confd/templates/proftpd.conf.tmpl
@@ -38,8 +38,8 @@ PassivePorts {{getenv "PASSIVE_LOWER_BOUND"}} {{getenv "PASSIVE_UPPER_BOUND"}}
     LDAPAttr uid cn
     
     LDAPServer {{getenv "LDAP_URI"}}
-    LDAPUseTLS {{getenv "LDAP_USE_TLS"}}
-    LDAPAuthBinds {{getenv "LDAP_USE_AUTH_BIND"}}
+    LDAPUseTLS {{getenv "LDAP_USE_TLS" "on"}}
+    LDAPAuthBinds {{getenv "LDAP_USE_AUTH_BIND" "on"}}
     LDAPBindDN "{{getenv "LDAP_BIND_DN"}}" {{getenv "LDAP_BIND_PASSWORD"}}
 
     LDAPUsers {{getenv "LDAP_BASE"}} "{{getenv "LDAP_FILTER"}}"