--- a/configure.ac	2009-08-20 09:12:07.000000000 +0200
+++ b/configure.ac	2009-08-20 09:13:17.000000000 +0200
@@ -21,6 +21,8 @@
 AC_PROG_LIBTOOL
 AC_SUBST(LIBTOOL_DEPS)
 
+AC_SYS_LARGEFILE
+
 dnl It's obsolete in current versions of gettext but it's needed in older
 AM_GNU_GETTEXT([external])
 AM_GNU_GETTEXT_VERSION([0.14.3])