1 files changed, 3 insertions, 16 deletions
diff --git a/src/_cffi_src/build_openssl.py b/src/_cffi_src/build_openssl.py
index 14ba5b35..3dcece58 100644
--- a/src/_cffi_src/build_openssl.py
+++ b/src/_cffi_src/build_openssl.py
@@ -37,25 +37,13 @@ def _osx_libraries(build_static):
         return ["ssl", "crypto"]
 
 
-_PRE_INCLUDE = """
-#include <openssl/opensslv.h>
-/*
-    LibreSSL removed e_os2.h from the public headers so we'll only include it
-    if we're using vanilla OpenSSL.
-*/
-#if !defined(LIBRESSL_VERSION_NUMBER)
-#include <openssl/e_os2.h>
-#endif
-#if defined(_WIN32)
-#include <windows.h>
-#endif
-"""
-
-
 ffi = build_ffi_for_binding(
     module_name="_openssl",
     module_prefix="_cffi_src.openssl.",
     modules=[
+        # This goes first so we can define some cryptography-wide symbols.
+        "cryptography",
+
         "aes",
         "asn1",
         "bignum",
@@ -88,7 +76,6 @@ ffi = build_ffi_for_binding(
         "pkcs7",
         "callbacks",
     ],
-    pre_include=_PRE_INCLUDE,
     libraries=_get_openssl_libraries(sys.platform),
     extra_link_args=extra_link_args(compiler_type()),
 )