diff --git a/docs/user/advanced.rst b/docs/user/advanced.rst
index 215a2ede..d6a05349 100644
--- a/docs/user/advanced.rst
+++ b/docs/user/advanced.rst
@@ -607,7 +607,8 @@ When the proxies configuration is not overridden in python as shown above,
 by default Requests relies on the proxy configuration defined by standard
 environment variables ``http_proxy``, ``https_proxy``, ``no_proxy``, 
 ``curl_ca_bundle``, and ``all_proxy``. Uppercase variants of these variables are also supported.
-You can therefore set them to configure Requests (you only need to export one)::
+You can therefore set them to configure Requests (only set the ones relevant
+to your needs)::
 
     $ export HTTP_PROXY="http://10.10.1.10:3128"
     $ export HTTPS_PROXY="http://10.10.1.10:1080"