diff --git a/modules/ngx_tcp_ssl_module.c b/modules/ngx_tcp_ssl_module.c
index b809b49..6d75b8b 100644
--- a/modules/ngx_tcp_ssl_module.c
+++ b/modules/ngx_tcp_ssl_module.c
@@ -385,13 +385,15 @@ ngx_tcp_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
     }
 
     /* a temporary 512-bit RSA key is required for export versions of MSIE */
-#if defined(nginx_version) && nginx_version >= 1000006
-    SSL_CTX_set_tmp_rsa_callback(conf->ssl.ctx, ngx_ssl_rsa512_key_callback); 
-#else
-    if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
-        return NGX_CONF_ERROR;
-    }
-#endif
+/*
+ * #if defined(nginx_version) && nginx_version >= 1000006
+ *    SSL_CTX_set_tmp_rsa_callback(conf->ssl.ctx, ngx_ssl_rsa512_key_callback); 
+ * #else
+ *    if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
+ *        return NGX_CONF_ERROR;
+ *    }
+ * #endif
+ */
 
     if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != NGX_OK) {
         return NGX_CONF_ERROR;
diff --git a/ngx_tcp_upstream_round_robin.c b/ngx_tcp_upstream_round_robin.c
index 1335cce..5e56c78 100644
--- a/ngx_tcp_upstream_round_robin.c
+++ b/ngx_tcp_upstream_round_robin.c
@@ -796,9 +796,9 @@ ngx_tcp_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc,
 
     rc = ngx_ssl_set_session(pc->connection, ssl_session);
 
-    ngx_log_debug2(NGX_LOG_DEBUG_TCP, pc->log, 0,
+    /* ngx_log_debug2(NGX_LOG_DEBUG_TCP, pc->log, 0,
                    "set session: %p:%d",
-                   ssl_session, ssl_session ? ssl_session->references : 0);
+                   ssl_session, ssl_session ? ssl_session->references : 0); */
 
     /* ngx_unlock_mutex(rrp->peers->mutex); */
 
@@ -821,8 +821,8 @@ ngx_tcp_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
         return;
     }
 
-    ngx_log_debug2(NGX_LOG_DEBUG_TCP, pc->log, 0,
-                   "save session: %p:%d", ssl_session, ssl_session->references);
+    /* ngx_log_debug2(NGX_LOG_DEBUG_TCP, pc->log, 0,
+                   "save session: %p:%d", ssl_session, ssl_session->references);*/
 
     peer = &rrp->peers->peer[rrp->current];
 
@@ -836,9 +836,9 @@ ngx_tcp_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
 
     if (old_ssl_session) {
 
-        ngx_log_debug2(NGX_LOG_DEBUG_TCP, pc->log, 0,
+        /* ngx_log_debug2(NGX_LOG_DEBUG_TCP, pc->log, 0,
                        "old session: %p:%d",
-                       old_ssl_session, old_ssl_session->references);
+                       old_ssl_session, old_ssl_session->references); */
 
         /* TODO: may block */