diff --git a/src/config.in b/src/config.in
index fe34dda65c4..0eba46124d7 100644
--- a/src/config.in
+++ b/src/config.in
@@ -100,6 +100,7 @@ and this notice must be preserved on all copies.  */
 #undef HAVE_XRMSETDATABASE
 #undef HAVE_RANDOM
 #undef HAVE_LIBXBSD
+#undef HAVE_CLOSEDIR
 
 /* If using GNU, then support inline function declarations. */
 #ifdef __GNUC__