diff --git a/Makefile b/Makefile
index 4f9f291..fd225e4 100644
--- a/Makefile
+++ b/Makefile
@@ -51,6 +51,7 @@ parser:
 
 	rm -f $(PARSER_OUT_FILE)
 
+	echo '/* eslint-env node, amd */'     >> $(PARSER_OUT_FILE)
 	echo '/* eslint no-unused-vars: 0 */' >> $(PARSER_OUT_FILE)
 	echo                                  >> $(PARSER_OUT_FILE)
 	cat $(PARSER_OUT_FILE_NEW)            >> $(PARSER_OUT_FILE)
diff --git a/lib/parser.js b/lib/parser.js
index 353a80d..ae56fa3 100644
--- a/lib/parser.js
+++ b/lib/parser.js
@@ -1,6 +1,13 @@
+/* eslint-env node, amd */
 /* eslint no-unused-vars: 0 */
 
-module.exports = (function() {
+(function(root, factory) {
+  if (typeof define === "function" && define.amd) {
+    define([], factory);
+  } else if (typeof module === "object" && module.exports) {
+    module.exports = factory();
+  }
+})(this, function() {
   "use strict";
 
   /*
@@ -4952,4 +4959,4 @@ module.exports = (function() {
     SyntaxError: peg$SyntaxError,
     parse:       peg$parse
   };
-})();
+});