Fix typo breaking setup.py on Windows.

Fixes #191

1 files changed, 2 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 6aa1ab4..ab66992 100644
--- a/setup.py
+++ b/setup.py
@@ -120,7 +120,8 @@ class _M2CryptoBuildExt(build_ext.build_ext):
                 self.openssl_default = os.environ.get('ProgramFiles')
             if not self.openssl_default:
                 raise RuntimeError('cannot detect platform')
-            self.openssl_default = os.path.join(self.openssl, 'OpenSSL')
+            self.openssl_default = os.path.join(self.openssl_default,
+                                               'OpenSSL')
         else:
             self.openssl_default = None