diff --git a/README.md b/README.md
index 09b1497..d10eebe 100644
--- a/README.md
+++ b/README.md
@@ -16,3 +16,5 @@ A simple Forth interpreter in Ruby (1.9).
     2 sq
     .
     4
+
+This is based on a sweet hack by [Russ Olsen](http://jroller.com/rolsen/) presented to me in a [GoodReads comment](http://www.goodreads.com/review/show/120660311).
diff --git a/src/rforth.rb b/src/rforth.rb
index 4fbb619..cbf66cc 100644
--- a/src/rforth.rb
+++ b/src/rforth.rb
@@ -94,9 +94,7 @@ class RForth
     end
 
     @dictionary.word(name) do
-      blocks.each do |b|
-        b.call
-      end
+      blocks.each {|b| b.call}
     end
   end