diff -Naur pyOpenSSL-0.13.orig/OpenSSL/crypto/crl.c pyOpenSSL-0.13/OpenSSL/crypto/crl.c
--- pyOpenSSL-0.13.orig/OpenSSL/crypto/crl.c	2011-09-02 17:46:13.000000000 +0200
+++ pyOpenSSL-0.13/OpenSSL/crypto/crl.c	2015-03-26 20:53:08.984999223 +0100
@@ -3,6 +3,7 @@
 #include "crypto.h"
 
 
+#if 0
 static X509_REVOKED * X509_REVOKED_dup(X509_REVOKED *orig) {
     X509_REVOKED *dupe = NULL;
 
@@ -32,6 +33,7 @@
     dupe->sequence = orig->sequence;
     return dupe;
 }
+#endif
 
 static char crypto_CRL_get_revoked_doc[] = "\n\
 Return revoked portion of the CRL structure (by value\n\