diff --git a/OpenSSL/ssl/ssl.h b/OpenSSL/ssl/ssl.h
index 933f578..75597ca 100644
--- a/OpenSSL/ssl/ssl.h
+++ b/OpenSSL/ssl/ssl.h
@@ -46,9 +46,9 @@
 extern ssl_Context_New_RETURN    ssl_Context_New    ssl_Context_New_PROTO;
 extern ssl_Connection_New_RETURN ssl_Connection_New ssl_Connection_New_PROTO;
 
-crypto_X509Obj* (*new_x509)(X509*, int);
-crypto_X509NameObj* (*new_x509name)(X509_NAME*, int);
-crypto_X509StoreObj* (*new_x509store)(X509_STORE*, int);
+extern crypto_X509Obj* (*new_x509)(X509*, int);
+extern crypto_X509NameObj* (*new_x509name)(X509_NAME*, int);
+extern crypto_X509StoreObj* (*new_x509store)(X509_STORE*, int);
 
 #else /* SSL_MODULE */