diff --git a/actionpack/CHANGELOG b/actionpack/CHANGELOG
index ef63a8a105..7eb69f4fbd 100644
--- a/actionpack/CHANGELOG
+++ b/actionpack/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Fix flip flopped logic in docs for url_for's :only_path option. Closes #4998. [esad@esse.at]
+
 * form.text_area handles the :size option just like the original text_area (:size => '60x10' becomes cols="60" rows="10").  [Jeremy Kemper]
 
 * Excise ingrown code from FormOptionsHelper#options_for_select. #5008 [anonymous]
diff --git a/actionpack/lib/action_controller/base.rb b/actionpack/lib/action_controller/base.rb
index f0997e3f6a..475144f539 100755
--- a/actionpack/lib/action_controller/base.rb
+++ b/actionpack/lib/action_controller/base.rb
@@ -421,7 +421,7 @@ module ActionController #:nodoc:
       # * <tt>:anchor</tt> -- specifies the anchor name to be appended to the path. For example, 
       #   <tt>url_for :controller => 'posts', :action => 'show', :id => 10, :anchor => 'comments'</tt> 
       #   will produce "/posts/show/10#comments".
-      # * <tt>:only_path</tt> --  if true, returns the absolute URL (omitting the protocol, host name, and port)
+      # * <tt>:only_path</tt> --  if true, returns the relative URL (omitting the protocol, host name, and port) (<tt>false</tt> by default)
       # * <tt>:trailing_slash</tt> --  if true, adds a trailing slash, as in "/archive/2005/". Note that this
       #   is currently not recommended since it breaks caching.
       # * <tt>:host</tt> -- overrides the default (current) host if provided