diff --git a/ucs-4.0-1/management/univention-directory-manager-modules/modules/univention/admin/handlers/__init__.py b/ucs-4.0-1/management/univention-directory-manager-modules/modules/univention/admin/handlers/__init__.py
index 57fe579..1d2d2a8 100644
--- a/ucs-4.0-1/management/univention-directory-manager-modules/modules/univention/admin/handlers/__init__.py
+++ b/ucs-4.0-1/management/univention-directory-manager-modules/modules/univention/admin/handlers/__init__.py
@@ -2003,7 +2003,7 @@ def _ldap_post_modify( self ):
 					ip = self['ip'][0]
 				self.__add_dns_forward_object( self[ 'name' ], dn, ip )
 				self.__add_related_ptrrecords(dn, ip)
-			else:
+			elif ip:
 				self.__add_dns_forward_object( self[ 'name' ], dn, ip )
 				self.__add_related_ptrrecords(dn, ip)