diff --git a/lib/gitlab/ldap/adapter.rb b/lib/gitlab/ldap/adapter.rb
index 983a2956a35..0777558d643 100644
--- a/lib/gitlab/ldap/adapter.rb
+++ b/lib/gitlab/ldap/adapter.rb
@@ -44,7 +44,8 @@ module Gitlab
       def users(field, value)
         if field.to_sym == :dn
           options = {
-            base: value
+            base: value,
+            scope: Net::LDAP::SearchScope_BaseObject
           }
         else
           options = {