diff --git a/lib/GrammarAnnotation.js b/lib/GrammarAnnotation.js
index 337135ca..f2e5f462 100644
--- a/lib/GrammarAnnotation.js
+++ b/lib/GrammarAnnotation.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const Builder = require('./builder');
+const Builder = require('./Builder');
 
 module.exports = class GrammarAnnotation extends Builder {
   constructor(spec, prod, node) {