diff --git a/patches/tls.h.patch b/patches/tls.h.patch
new file mode 100644
index 0000000..3d72749
--- /dev/null
+++ b/patches/tls.h.patch
@@ -0,0 +1,32 @@
+--- include/tls.h.orig	2017-02-13 20:19:55.918636579 +0900
++++ include/tls.h	2017-02-13 20:21:18.313073161 +0900
+@@ -22,6 +22,13 @@
+ extern "C" {
+ #endif
+ 
++#ifdef _MSC_VER
++#ifndef LIBRESSL_INTERNAL
++#include <basetsd.h>
++typedef SSIZE_T ssize_t;
++#endif
++#endif
++
+ #include <sys/types.h>
+ 
+ #include <stddef.h>
+--- libtls-standalone/include/tls.h.orig	2017-02-13 20:21:48.297958529 +0900
++++ libtls-standalone/include/tls.h	2017-02-13 20:21:48.296958502 +0900
+@@ -22,6 +22,13 @@
+ extern "C" {
+ #endif
+ 
++#ifdef _MSC_VER
++#ifndef LIBRESSL_INTERNAL
++#include <basetsd.h>
++typedef SSIZE_T ssize_t;
++#endif
++#endif
++
+ #include <sys/types.h>
+ 
+ #include <stddef.h>