#ifdef USE_NLS
// apt will use the gettext implementation of the C library
-# include <libintl.h>
+#include <libintl.h>
+#include <locale.h>
# ifdef APT_DOMAIN
# define _(x) dgettext(APT_DOMAIN,x)
# define P_(msg,plural,n) dngettext(APT_DOMAIN,msg,plural,n)