diff --git a/Slang/slang.js b/Slang/slang.js
index 1fcde7e..968edcd 100755
--- a/Slang/slang.js
+++ b/Slang/slang.js
@@ -849,6 +849,9 @@ var BOOTSTRAP = [
 'infix: >= ge',
 '',
 '',
+'-- Prefix operation definition...',
+'-- Example:',
+'--		:: echo: ( | txt -- | ) [ \\ _flip \\ print _flip ]',
 '-- swap stack and code untill the block finishes and consumes it\'s arguments',
 '-- then swap them back...',
 ':: prefix: ( | op word -- | ) [',
@@ -864,6 +867,7 @@ var BOOTSTRAP = [
 '	] \\ exec 2 2 _swapN ]',
 '',
 '',
+'',
 '-- Tests and examples...',
 '',
 '-- Mandatory "hello word" word example...',