diff --git a/lib/puppet/reference/function.rb b/lib/puppet/reference/function.rb
index 1333e0d26..7d39bebd5 100644
--- a/lib/puppet/reference/function.rb
+++ b/lib/puppet/reference/function.rb
@@ -1,13 +1,17 @@
 function = Puppet::Util::Reference.newreference :function, :doc => "All functions available in the parser" do
   Puppet::Parser::Functions.functiondocs
 end
 function.header = "
 There are two types of functions in Puppet: Statements and rvalues.
 Statements stand on their own and do not return arguments; they are used for
 performing stand-alone work like importing.  Rvalues return values and can
 only be used in a statement requiring a value, such as an assignment or a case
 statement.
 
+Functions execute on the Puppet master.  They do not execute on the Puppet agent.  
+Hence they only have access to the commands and data available on the Puppet master 
+host.
+
 Here are the functions available in Puppet:
 
 "