Index: configure.ac
===================================================================
--- configure.ac.orig
+++ configure.ac
@@ -9,6 +9,7 @@ AM_INIT_AUTOMAKE([check-news dist-bzip2]
 AM_CONFIG_HEADER([src/config.h])
 AC_GNU_SOURCE
 AM_GNU_GETTEXT([external])
+AM_GNU_GETTEXT_VERSION([0.18.1])
 
 # Checks for programs.
 AC_PROG_CC
