@@ -6,10 +6,11 @@
 #include <tcl.h>
 #include <stdio.h>
 #include <openssl/bio.h>
 #include <openssl/sha.h>
 #include <openssl/x509.h>
+#include <openssl/x509v3.h>
 #include <openssl/asn1.h>
 #include "tlsInt.h"
 
 /*
  *  Ensure these are not macros - known to be defined on Win32