diff --git a/packages/viewer/src/modules/batching/LineBatch.ts b/packages/viewer/src/modules/batching/LineBatch.ts
index 8c0557644..b3d63540d 100644
--- a/packages/viewer/src/modules/batching/LineBatch.ts
+++ b/packages/viewer/src/modules/batching/LineBatch.ts
@@ -98,7 +98,7 @@ export default class LineBatch implements Batch {
   }
 
   public getCount(): number {
-    return this.geometry.attributes.position.array.length / 6
+    return this.geometry.attributes.instanceStart.array.length / 6
   }
 
   public setBatchMaterial(material: SpeckleLineMaterial) {