--- ../cache/racket-6.11/src/racket/gc2/newgc.c	2017-07-07 19:13:22.000000000 +0000
+++ ./src/racket/gc2/newgc.c	2018-01-05 05:55:28.900376813 +0000
@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>
+#include <strings.h>
 #include "platforms.h"
 #include "../src/schpriv.h"
 #include "gc2.h"