diff --git a/config.h.in b/config.h.in
index 49ea05ad7..6c3fdf3da 100644
--- a/config.h.in
+++ b/config.h.in
@@ -159,6 +159,9 @@
 #undef HAVE_STRINGS_H
 #endif /* convex */
 
+/* Define if you have the <dirent.h> header file.  */
+#undef HAVE_DIRENT_H
+
 /* Define if you have the <unistd.h> header file.  */
 #undef HAVE_UNISTD_H