diff --git a/README.rdoc b/README.rdoc
index b2c0511..e813c45 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -15,9 +15,10 @@ Require the library like you would expect:
 Then create a new MemInfo object:
 
  m = MemInfo.new
- m.memtotal => 70000
- m.memfree  => 54300
- m.memused  => 15700
+ m.memtotal     => 70000
+ m.memfree      => 54300
+ m.memused      => 15700
+ m.free_buffers => 75000 
 
 Take a look in lib/mem_info.rb for all fields that are available.
 
diff --git a/lib/mem_info.rb b/lib/mem_info.rb
index 8582441..b9cf268 100644
--- a/lib/mem_info.rb
+++ b/lib/mem_info.rb
@@ -9,7 +9,8 @@ class MemInfo
   @@attributes = {
     :memtotal       => "MemTotal",
     :memfree        => "MemFree",
-    :buffers        => "Cached",
+    :buffers        => "Buffers",
+    :cached         => "Cached",
     :swapcached     => "SwapCached",
     :active         => "Active",
     :inactive       => "Inactive",
@@ -58,10 +59,14 @@ def initialize
   def memused
     @memtotal - @memfree
   end
+
+  def free_buffers
+    @memfree + @buffers + @cached
+  end
   
   private
     def regex_match(attribute, line)
       regex = Regexp.new("#{@@attributes[attribute]}:\\s*(.*?)\\s")
       regex.match(line)[1] if regex === line
     end
-end
\ No newline at end of file
+end