diff --git a/src/main/java/org/ultramine/server/UMEventHandler.java b/src/main/java/org/ultramine/server/UMEventHandler.java
index ad79ece..1cda5a0 100644
--- a/src/main/java/org/ultramine/server/UMEventHandler.java
+++ b/src/main/java/org/ultramine/server/UMEventHandler.java
@@ -237,6 +237,8 @@
 		if(attacker != null && attacker.isEntityPlayerMP())
 		{
 			EntityPlayerMP player = (EntityPlayerMP)attacker;
+			if(player.playerNetServerHandler == null)
+				return;
 			if(!PermissionHandler.getInstance().has(player, "ability.player.attack"))
 			{
 				e.setCanceled(true);