diff --git a/lib/util/ldaputil.js b/lib/util/ldaputil.js
index 1e38c33f..60e59761 100644
--- a/lib/util/ldaputil.js
+++ b/lib/util/ldaputil.js
@@ -60,7 +60,7 @@ module.exports.login = function(options, username, password) {
           })
         }
 
-    if (typeof options.search.filter !== 'undefined') {
+    if (options.search.filter) {
       var parsedFilter = ldap.parseFilter(options.search.filter)
       query.filter.filters.push(parsedFilter)
     }