diff --git a/configure.ac b/configure.ac
index 2e7d562..c8dd741 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,6 +7,10 @@ AC_INIT([Extract PDFmark], [1.1.1], , [extractpdfmark],
 AM_INIT_AUTOMAKE([foreign])
 AC_CONFIG_SRCDIR([src/main.cc])
 AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIRS([m4])
+
+AM_GNU_GETTEXT_VERSION([0.25])
+AM_GNU_GETTEXT([external])
 
 PACKAGE_COPYRIGHT="Copyright (C) 2016-2022 Masamichi Hosoda"
 PACKAGE_LICENSE="License: GPL3+"