From 4502e7b5eceb861eee9b4871e3adfe6db3bde6ec Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Mon, 12 Aug 2013 07:40:35 -0400
Subject: Some systems need this header

---
 cryptography/bindings/openssl/api.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cryptography/bindings/openssl/api.py b/cryptography/bindings/openssl/api.py
index 2da156cd..58adaa88 100644
--- a/cryptography/bindings/openssl/api.py
+++ b/cryptography/bindings/openssl/api.py
@@ -38,6 +38,7 @@ class API(object):
         self._populate_ffi(ffi)
         self._ffi = ffi
         self._lib = ffi.verify("""
+        #include <openssl/err.h>
         #include <openssl/evp.h>
         """)
         self._lib.OpenSSL_add_all_algorithms()
-- 
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