diff --git a/docs/user/advanced.rst b/docs/user/advanced.rst
index c0e6aabc..3b060a0e 100644
--- a/docs/user/advanced.rst
+++ b/docs/user/advanced.rst
@@ -483,7 +483,10 @@ To use HTTP Basic Auth with your proxy, use the `http://user:password@host/` syn
     }
 
 To give a proxy for a specific scheme and host, use the
-`scheme://host` form for the key::
+`scheme://hostname` form for the key.  This will match for
+any request to the given scheme and exact hostname.
+
+::
 
     proxies = {
       "http://10.20.1.128": "http://10.10.1.10:5323",