diff -up virtuoso-opensource-5.0.11/libsrc/Dk/Dkernel.c.openssl virtuoso-opensource-5.0.11/libsrc/Dk/Dkernel.c
--- virtuoso-opensource-5.0.11/libsrc/Dk/Dkernel.c.openssl	2009-04-17 22:07:28.000000000 +0200
+++ virtuoso-opensource-5.0.11/libsrc/Dk/Dkernel.c	2009-08-26 16:03:23.000000000 +0200
@@ -4798,7 +4798,11 @@ dk_ssl_free (void *old)
 static void
 ssl_server_init ()
 {
+#if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
+  const SSL_METHOD *ssl_server_method = NULL;
+#else
   SSL_METHOD *ssl_server_method = NULL;
+#endif
   unsigned char tmp[1024];
 #ifndef NO_THREAD
   char err_buf[1024];
@@ -4888,12 +4892,12 @@ ssl_server_init ()
       SSL_CTX_set_session_id_context (ssl_server_ctx, (unsigned char *) &session_id_context, sizeof session_id_context);
 
       skCAList = SSL_CTX_get_client_CA_list (ssl_server_ctx);
-      if (sk_num ((STACK *) skCAList) == 0)
+      if (sk_X509_NAME_num (skCAList) == 0)
 	log_warning ("ODBC X509 Client authentication requested but no CA known for verification");
-      for (i = 0; i < sk_num ((STACK *) skCAList); i++)
+      for (i = 0; i < sk_X509_NAME_num (skCAList); i++)
 	{
 	  char ca_buf[1024];
-	  X509_NAME *ca_name = (X509_NAME *) sk_value ((STACK *) skCAList, i);
+	  X509_NAME *ca_name = (X509_NAME *) sk_X509_NAME_value (skCAList, i);
 	  if (X509_NAME_oneline (ca_name, ca_buf, sizeof (ca_buf)))
 	    log_debug ("ODBC Server Using X509 Client CA %s", ca_buf);
 	}
@@ -5058,7 +5062,7 @@ ssl_setup:
 
   if (ca && ca[0] != 0)
     {
-      sk_pop_free ((STACK *) ca_list, (void (*)(void *)) X509_free);
+      sk_X509_pop_free (ca_list, X509_free);
       ca_list = NULL;
       ca_list = PEM_load_certs (ca, passwd);
     }
@@ -5067,30 +5071,30 @@ ssl_setup:
     {
       X509_free (cert);
       EVP_PKEY_free (pkey);
-      sk_pop_free ((STACK *) ca_list, (void (*)(void *)) X509_free);
+      sk_X509_pop_free (ca_list, X509_free);
       return 0;
     }
   EVP_PKEY_free (pkey);
   if (!SSL_use_certificate (ssl, cert))
     {
       X509_free (cert);
-      sk_pop_free ((STACK *) ca_list, (void (*)(void *)) X509_free);
+      sk_X509_pop_free (ca_list, X509_free);
       return 0;
     }
   X509_free (cert);
 
   if (!SSL_check_private_key (ssl))
     {
-      sk_pop_free ((STACK *) ca_list, (void (*)(void *)) X509_free);
+      sk_X509_pop_free (ca_list, X509_free);
       return 0;
     }
-  for (i = 0; i < sk_num ((STACK *) ca_list); i++)
+  for (i = 0; i < sk_X509_num (ca_list); i++)
     {
-      X509 *ca = (X509 *) sk_value ((STACK *) ca_list, i);
+      X509 *ca = sk_X509_value (ca_list, i);
       SSL_add_client_CA (ssl, ca);
       X509_STORE_add_cert (SSL_CTX_get_cert_store (ssl_ctx), ca);
     }
-  sk_pop_free ((STACK *) ca_list, (void (*)(void *)) X509_free);
+  sk_X509_pop_free (ca_list, X509_free);
   return 1;
 }
 
diff -up virtuoso-opensource-5.0.11/libsrc/Wi/http.c.openssl virtuoso-opensource-5.0.11/libsrc/Wi/http.c
--- virtuoso-opensource-5.0.11/libsrc/Wi/http.c.openssl	2009-04-19 23:48:56.000000000 +0200
+++ virtuoso-opensource-5.0.11/libsrc/Wi/http.c	2009-08-26 16:28:03.000000000 +0200
@@ -7601,13 +7601,13 @@ http_set_ssl_listen (dk_session_t * list
       SSL_CTX_set_client_CA_list (ssl_ctx, skCAList);
       skCAList = SSL_CTX_get_client_CA_list(ssl_ctx);
 
-      if (sk_num((STACK *) skCAList) == 0)
+      if (sk_X509_NAME_num(skCAList) == 0)
 	log_warning ("HTTPS Client authentication requested but no CA known for verification");
 
-      for (i = 0; i < sk_num((STACK *) skCAList); i++)
+      for (i = 0; i < sk_X509_NAME_num(skCAList); i++)
 	{
 	  char ca_buf[1024];
-	  X509_NAME *ca_name = (X509_NAME *) sk_value ((STACK *) skCAList, i);
+	  X509_NAME *ca_name = sk_X509_NAME_value (skCAList, i);
 	  if (X509_NAME_oneline (ca_name, ca_buf, sizeof (ca_buf)))
 	    log_debug ("HTTPS Using X509 Client CA %s", ca_buf);
 	}
@@ -9697,13 +9697,13 @@ http_init_part_two ()
 
 	  SSL_CTX_set_client_CA_list (ssl_ctx, skCAList);
 	  skCAList = SSL_CTX_get_client_CA_list (ssl_ctx);
-	  if (sk_num((STACK *) skCAList) == 0)
+	  if (sk_X509_NAME_num(skCAList) == 0)
 	    log_warning ("HTTPS Client authentication requested but no CA known for verification");
 
-	  for (i = 0; i < sk_num((STACK *) skCAList); i++)
+	  for (i = 0; i < sk_X509_NAME_num(skCAList); i++)
 	    {
 	      char ca_buf[1024];
-	      X509_NAME *ca_name = (X509_NAME *) sk_value ((STACK *) skCAList, i);
+	      X509_NAME *ca_name = sk_X509_NAME_value (skCAList, i);
               if (X509_NAME_oneline (ca_name, ca_buf, sizeof (ca_buf)))
 		log_debug ("HTTPS Using X509 Client CA %s", ca_buf);
 	    }