--- a/src/stream/ngx_stream_upstream.h
+++ b/src/stream/ngx_stream_upstream.h
@@ -79,6 +79,21 @@ struct ngx_stream_upstream_srv_conf_s {
 
 
 typedef struct {
+    ngx_str_t                          host;
+    in_port_t                          port;
+    ngx_uint_t                         no_port; /* unsigned no_port:1 */
+
+    ngx_uint_t                         naddrs;
+    ngx_resolver_addr_t               *addrs;
+
+    struct sockaddr                   *sockaddr;
+    socklen_t                          socklen;
+
+    ngx_resolver_ctx_t                *ctx;
+} ngx_stream_upstream_resolved_t;
+
+
+typedef struct {
     ngx_peer_connection_t              peer;
     ngx_buf_t                          downstream_buf;
     ngx_buf_t                          upstream_buf;
@@ -88,6 +103,7 @@ typedef struct {
 #if (NGX_STREAM_SSL)
     ngx_str_t                          ssl_name;
 #endif
+    ngx_stream_upstream_resolved_t    *resolved;
     unsigned                           connected:1;
     unsigned                           proxy_protocol:1;
 } ngx_stream_upstream_t;