link against advapi32 on windows
diff --git a/cryptography/hazmat/bindings/openssl/binding.py b/cryptography/hazmat/bindings/openssl/binding.py
index 9df26cd..843bd3e 100644
--- a/cryptography/hazmat/bindings/openssl/binding.py
+++ b/cryptography/hazmat/bindings/openssl/binding.py
@@ -91,7 +91,7 @@
         if sys.platform != "win32":
             libraries = ["crypto", "ssl"]
         else:  # pragma: no cover
-            libraries = ["libeay32", "ssleay32"]
+            libraries = ["libeay32", "ssleay32", "advapi32"]
 
         cls.ffi, cls.lib = build_ffi(cls._module_prefix, cls._modules,
                                      _OSX_PRE_INCLUDE, _OSX_POST_INCLUDE,