diff --git a/config.h.in b/config.h.in
index f44c8ed..b8b2d17 100644
--- a/config.h.in
+++ b/config.h.in
@@ -18,6 +18,9 @@
 /* Define to 1 if you have the <limits.h> header file. */
 #undef HAVE_LIMITS_H
 
+/* Define to 1 if you have the <locale.h> header file. */
+#undef HAVE_LOCALE_H
+
 /* Define to 1 if your system has a GNU libc compatible `malloc' function, and
    to 0 otherwise. */
 #undef HAVE_MALLOC
@@ -32,6 +35,9 @@
    and to 0 otherwise. */
 #undef HAVE_REALLOC
 
+/* Define to 1 if you have the `setlocale' function. */
+#undef HAVE_SETLOCALE
+
 /* Define to 1 if you have the `snprintf' function. */
 #undef HAVE_SNPRINTF