--- /dev/null
+--- ../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"