diff --git a/src/components/fabric/QPolygon.js b/src/components/fabric/QPolygon.js
index e095de42..3f82dec1 100644
--- a/src/components/fabric/QPolygon.js
+++ b/src/components/fabric/QPolygon.js
@@ -248,6 +248,9 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
   },
 
   addLengthText() {
+    if (['module', 'arrow'].includes(this.name)) {
+      return
+    }
     this.canvas
       ?.getObjects()
       .filter((obj) => obj.name === 'lengthText' && obj.parentId === this.id)