diff --git a/Projekte/mdga/client/src/main/java/pp/mdga/client/InputSynchronizer.java b/Projekte/mdga/client/src/main/java/pp/mdga/client/InputSynchronizer.java
index 3c1c31c4..e66c6ede 100644
--- a/Projekte/mdga/client/src/main/java/pp/mdga/client/InputSynchronizer.java
+++ b/Projekte/mdga/client/src/main/java/pp/mdga/client/InputSynchronizer.java
@@ -152,6 +152,7 @@ else if (name.equals("MouseLeft") || name.equals("MouseRight") || name.equals("M
      * Detects the hovered piece and updates its hover state.
      */
     private <T extends AbstractControl> T checkHover(Camera cam, Node root, Class<T> controlType) {
+        if(cam == null || root == null || controlType == null) return null;
         CollisionResults results = new CollisionResults();
         Ray ray = new Ray(cam.getLocation(), getMousePos(cam).subtract(cam.getLocation()).normalize());
         root.collideWith(ray, results);