From a3652a8d3893d1f8f638613ae8b2198342b251ba Mon Sep 17 00:00:00 2001
From: Paul Kehrer <paul.l.kehrer@gmail.com>
Date: Sat, 19 Apr 2014 12:12:08 -0500
Subject: make the cms binding work properly on windows

---
 cryptography/hazmat/bindings/openssl/cms.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cryptography/hazmat/bindings/openssl/cms.py b/cryptography/hazmat/bindings/openssl/cms.py
index 4888e5e3..a3760f2c 100644
--- a/cryptography/hazmat/bindings/openssl/cms.py
+++ b/cryptography/hazmat/bindings/openssl/cms.py
@@ -15,6 +15,11 @@ from __future__ import absolute_import, division, print_function
 
 INCLUDES = """
 #if !defined(OPENSSL_NO_CMS) && OPENSSL_VERSION_NUMBER >= 0x0090808fL
+// The next define should really be in the OpenSSL header, but it is missing.
+// Failing to include this on Windows causes compilation failures.
+#if defined(OPENSSL_SYS_WINDOWS)
+#include <windows.h>
+#endif
 #include <openssl/cms.h>
 #endif
 """
-- 
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