--- Modules/_ctypes/libffi/src/dlmalloc.c.orig	Fri Apr 18 19:08:34 2014
+++ Modules/_ctypes/libffi/src/dlmalloc.c	Fri Apr 18 19:08:56 2014
@@ -1200,7 +1200,7 @@ int mspace_mallopt(int, int);
 #ifndef LACKS_UNISTD_H
 #include <unistd.h>     /* for sbrk */
 #else /* LACKS_UNISTD_H */
-#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
+#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__minix)
 extern void*     sbrk(ptrdiff_t);
 #endif /* FreeBSD etc */
 #endif /* LACKS_UNISTD_H */