diff --git a/racevisionGame/src/main/java/mock/model/collider/Collider.java b/racevisionGame/src/main/java/mock/model/collider/Collider.java
index 93a2a7e0..029fee57 100644
--- a/racevisionGame/src/main/java/mock/model/collider/Collider.java
+++ b/racevisionGame/src/main/java/mock/model/collider/Collider.java
@@ -45,7 +45,7 @@ public abstract class Collider extends Observable implements Locatable {
 
     /**
      * Handle a collision event
-     * @param collider
+     * @param collider Boat that is colliding
      * @param e details of collision
      */
     public abstract void onCollisionEnter(Boat collider, Collision e);