--- gforth/Attic/io.c	1995/11/07 18:06:46	1.11
+++ gforth/Attic/io.c	1995/12/26 17:35:36	1.12
@@ -25,6 +25,7 @@
    Use -D_POSIX_VERSION for POSIX systems.
 */
 
+#include "config.h"
 #include <unistd.h>
 
 #ifdef apollo