diff --git a/src/paper.js b/src/paper.js
index ca0d4d0b..cf83fdf3 100644
--- a/src/paper.js
+++ b/src/paper.js
@@ -67,6 +67,7 @@ var paper = new function() {
 //#include "path/SegmentPoint.js"
 //#include "path/SelectionState.js"
 //#include "path/Curve.js"
+//#include "path/CurveFlattener.js"
 //#include "path/CurveLocation.js"
 //#include "path/PathItem.js"
 //#include "path/Path.js"