README in rev-0.2.0 vs README in rev-0.2.1

@@ -9,9 +9,10 @@
 use them in conjunction with Rev to build asynchronous event-driven 
 applications.
 
 You can include Rev in your programs with:
 
+  require 'rubygems'
   require 'rev'
 
 == Anatomy
 
 Rev builds on two core classes which bind to the libev API: