diff --git a/Makefile.PL b/Makefile.PL
index 8c0b2cb163..5aa93104a3 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -399,7 +399,7 @@ my %config_defaults = (
   'INSTALL_ZEBRA'     => 'yes',
   'INSTALL_SRU'       => 'yes',
   'INSTALL_PAZPAR2'   => 'no',
-  'AUTH_INDEX_MODE'   => 'grs1',
+  'AUTH_INDEX_MODE'   => 'dom',
   'ZEBRA_MARC_FORMAT' => 'marc21',
   'ZEBRA_LANGUAGE'    => 'en',
   'ZEBRA_USER'        => 'kohauser',