diff --git a/lib/coffee-script.js b/lib/coffee-script.js
index 0637570d..5d4ad07e 100644
--- a/lib/coffee-script.js
+++ b/lib/coffee-script.js
@@ -32,9 +32,6 @@
       return this.pos;
     }
   };
-  // Improved error messages.
-  // parser.parseError: (message, hash) ->
-  //   throw new Error 'Unexpected ' + parser.terminals_[hash.token] + ' on line ' + hash.line
   exports.VERSION = '0.5.0';
   // Compile CoffeeScript to JavaScript, using the Coffee/Jison compiler.
   exports.compile = function compile(code, options) {
diff --git a/src/coffee-script.coffee b/src/coffee-script.coffee
index 51be3dc3..6b42be31 100644
--- a/src/coffee-script.coffee
+++ b/src/coffee-script.coffee
@@ -24,10 +24,6 @@ parser.lexer: {
   showPosition: -> @pos
 }
 
-# Improved error messages.
-# parser.parseError: (message, hash) ->
-#   throw new Error 'Unexpected ' + parser.terminals_[hash.token] + ' on line ' + hash.line
-
 exports.VERSION: '0.5.0'
 
 # Compile CoffeeScript to JavaScript, using the Coffee/Jison compiler.