diff --git a/lib/isc/netmgr/tcp.c b/lib/isc/netmgr/tcp.c
index 71eee4a2d9..c6bb2812ff 100644
--- a/lib/isc/netmgr/tcp.c
+++ b/lib/isc/netmgr/tcp.c
@@ -1145,6 +1145,13 @@ tcp_send_direct(isc_nmsocket_t *sock, isc__nm_uvreq_t *req) {
 		}
 	}
 
+	isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL, ISC_LOGMODULE_NETMGR,
+		      ISC_LOG_DEBUG(3),
+		      "throttling TCP connection, the other side is not "
+		      "reading the data, switching to uv_write()");
+	sock->reading_throttled = true;
+	isc__nm_stop_reading(sock);
+
 	r = uv_write(&req->uv_req.write, &sock->uv_handle.stream, bufs, nbufs,
 		     tcp_send_cb);
 	if (r < 0) {