diff --git a/editor/index.html b/editor/index.html
index 401411845f221a..374a39ca91122b 100644
--- a/editor/index.html
+++ b/editor/index.html
@@ -18,6 +18,7 @@
 		<script src="../examples/js/controls/EditorControls.js"></script>
 		<script src="../examples/js/controls/TransformControls.js"></script>
 
+		<script src="../examples/js/libs/chevrotain.min.js"></script>
 		<script src="../examples/js/libs/jszip.min.js"></script>
 		<script src="../examples/js/libs/inflate.min.js"></script> <!-- FBX -->