diff --git a/src/main/java/org/ultramine/server/chunk/ChunkSendManager.java b/src/main/java/org/ultramine/server/chunk/ChunkSendManager.java
index 6dea730..2c674fa 100644
--- a/src/main/java/org/ultramine/server/chunk/ChunkSendManager.java
+++ b/src/main/java/org/ultramine/server/chunk/ChunkSendManager.java
@@ -93,6 +93,7 @@
 	
 	public void removeFrom(PlayerManager manager)
 	{
+		if(this.manager == null) return;
 		if(this.manager != manager) throw new IllegalStateException();
 		
 		toSend.clear();