diff --git management/univention-directory-manager-modules/modules/univention/admin/handlers/shares/printer.py management/univention-directory-manager-modules/modules/univention/admin/handlers/shares/printer.py
index 5c07a746f3..fd7d67317d 100644
--- management/univention-directory-manager-modules/modules/univention/admin/handlers/shares/printer.py
+++ management/univention-directory-manager-modules/modules/univention/admin/handlers/shares/printer.py
@@ -253,7 +253,7 @@ class object(univention.admin.handlers.simpleLdap):
 	def open(self):
 		# find the producer
 		univention.admin.handlers.simpleLdap.open(self)
-		models = printermodel.lookup(self.co, self.lo, 'printerModel="%s*' % self['model'])
+		models = printermodel.lookup(self.co, self.lo, filter_format('printerModel="%s*', [self['model']]))
 		ud.debug(ud.ADMIN, ud.INFO, "printermodel: %s" % str(models))
 		if not models or len(models) > 1:
 			self['producer'] = []