diff --git a/library/system/setup b/library/system/setup
index c5b408afca3..3194500cb2e 100644
--- a/library/system/setup
+++ b/library/system/setup
@@ -55,7 +55,8 @@ notes:
       remote systems. (See also M(facter) and M(ohai).)
     - The filter option filters only the first level subkey below ansible_facts.
     - If the target host is Windows, you will not currently have the ability to use
-      C(fact_path) or C(filter).
+      C(fact_path) or C(filter) as this is provided by a simpler implementation of the module.
+      Different facts are returned for Windows hosts.
 author: Michael DeHaan
 '''