diff --git a/Material-Group.md b/Material-Group.md
index 1db6e3d..67a5471 100644
--- a/Material-Group.md
+++ b/Material-Group.md
@@ -24,7 +24,7 @@ Adding a group to another group is not impacted by the type of group. For exampl
 Here is an example of you could create some material group
 ```java
 @EventHandler
-public void onConfigReady(){
+public void onConfigReady(CAConfigReadyEvent event){
     // Create group of zombie drops
     IncludeGroup zombieGroup = new IncludeGroup("zombieDrop");
     zombieGroup.addToPolicy(Material.ROTTEN_FLESH) // Please note "addToPolicy would be "exclude from group" for ExcludeGroup