diff --git a/src/pyelliptic/openssl.py b/src/pyelliptic/openssl.py
index 85a92f4e..be2f2afc 100644
--- a/src/pyelliptic/openssl.py
+++ b/src/pyelliptic/openssl.py
@@ -440,7 +440,7 @@ def loadOpenSSL():
                 path.join(environ['RESOURCEPATH'], '..', 'Frameworks','libcrypto.1.0.0.dylib')
                 ])
         elif 'win32' in sys.platform or 'win64' in sys.platform:
-            lib.append(path.join(sys._MEIPASS, 'libeay32.dll'))
+            libdir.append(path.join(sys._MEIPASS, 'libeay32.dll'))
         else:
             libdir.extend([
                 path.join(sys._MEIPASS, 'libcrypto.so'),