diff --git a/web/app/3d/craft/brep/cut-extrude.js b/web/app/3d/craft/brep/cut-extrude.js
index ec2a8e8f..ac607ac3 100644
--- a/web/app/3d/craft/brep/cut-extrude.js
+++ b/web/app/3d/craft/brep/cut-extrude.js
@@ -68,7 +68,6 @@ export class ParametricExtruder extends Extruder {
   constructor(params) {
     super();
     this.params = params;
-    this.approxIndex = new Map();
   }
   
   prepareLidCalculation(baseNormal, lidNormal) {