diff --git a/dywmtohrda.js b/dywmtohrda.js
index 3c49e18..34e4ceb 100644
--- a/dywmtohrda.js
+++ b/dywmtohrda.js
@@ -171,7 +171,7 @@ if (this.spawningBullets === true) {
 		
 		var raycaster = new THREE.Raycaster();
 		
-		raycaster.ray = new THREE.Ray(this.camera.position.instance, start.sub(this.camera.position.instance).normalize());
+		raycaster.ray = new THREE.Ray(this.camera.position.instance, start.clone().sub(this.camera.position.instance).normalize());
 		
 		var intersects = raycaster.intersectObjects(
 			GameLib.EntityManager.Instance.queryComponents(GameLib.D3.Mesh).map(