diff --git a/lib/pg_ldap_sync/application.rb b/lib/pg_ldap_sync/application.rb
index 9b0cd09..87762d6 100644
--- a/lib/pg_ldap_sync/application.rb
+++ b/lib/pg_ldap_sync/application.rb
@@ -172,7 +172,7 @@ class Application
     if @groups_fname != ''
       res = @ldap.search(
             base: ldap_group_conf[:base],
-            filter: format_groups_for_ldap_users(@groups, ldap_user_conf[:filter]),
+            filter: format_groups_for_ldap_groups(@groups, ldap_group_conf[:filter]),
             attributes: [name_attribute, member_attribute, :dn]
       )
     else