diff --git a/src/parser.js b/src/parser.js
index d9f3c10..2a65190 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -30,7 +30,7 @@ PEG.parser = (function(){
   
   var result = {
     /*
-     * Parses the input with a generated parser. If the parsing is successfull,
+     * Parses the input with a generated parser. If the parsing is successful,
      * returns a value explicitly or implicitly specified by the grammar from
      * which the parser was generated (see |PEG.buildParser|). If the parsing is
      * unsuccessful, throws |PEG.parser.SyntaxError| describing the error.