diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 61fad5ca3..01c7877e6 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -2113,6 +2113,10 @@ ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u,
             c->tcp_nopush = NGX_TCP_NOPUSH_UNSET;
         }
 
+        if (c->read->ready) {
+            ngx_post_event(c->read, &ngx_posted_events);
+        }
+
         return;
     }