diff --git a/OpenSSL/crypto/crypto.h b/OpenSSL/crypto/crypto.h
index 057b5dd..9b9663d 100644
--- a/OpenSSL/crypto/crypto.h
+++ b/OpenSSL/crypto/crypto.h
@@ -63,7 +63,7 @@
 
 #define crypto_API_pointers             8
 
-#ifdef crypto_MODULE
+#if defined(PY3) || defined(crypto_MODULE)
 
 extern crypto_X509_New_RETURN      crypto_X509_New      crypto_X509_New_PROTO;
 extern crypto_X509Name_New_RETURN  crypto_X509Name_New  crypto_X509Name_New_PROTO;