--- zx.h.orig	2016-02-29 00:16:50 UTC
+++ zx.h
@@ -29,6 +29,7 @@
 #include <memory.h>
 #include <string.h>
 #include <stdarg.h>
+#include <limits.h>
 
 #ifdef USE_OPENSSL
 #include <openssl/x509.h>