diff --git a/docs/root/configuration/http/http_filters/router_filter.rst b/docs/root/configuration/http/http_filters/router_filter.rst
index 0aaa931891e9..4ca285e9eda7 100644
--- a/docs/root/configuration/http/http_filters/router_filter.rst
+++ b/docs/root/configuration/http/http_filters/router_filter.rst
@@ -360,9 +360,9 @@ HTTP response headers set on downstream responses
 x-envoy-upstream-service-time
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Contains the time in milliseconds spent by the upstream host processing the request. This is useful
-if the client wants to determine service time compared to network latency. This header is set on
-responses.
+Contains the time in milliseconds spent by the upstream host processing the request and the network
+latency between Envoy and upstream host. This is useful if the client wants to determine service time
+compared to network latency between client and Envoy. This header is set on responses.
 
 .. _config_http_filters_router_x-envoy-overloaded_set: