diff --git a/src/main/java/com/alttd/fishingevent/gui/GUIListener.java b/src/main/java/com/alttd/fishingevent/gui/GUIListener.java
index c8b5a1f..9f18272 100644
--- a/src/main/java/com/alttd/fishingevent/gui/GUIListener.java
+++ b/src/main/java/com/alttd/fishingevent/gui/GUIListener.java
@@ -47,7 +47,8 @@ public class GUIListener implements Listener {
     public void onClose(InventoryCloseEvent event) {
         HumanEntity player = event.getPlayer();
         GUI gui = GUI.GUIByUUID.get(player.getUniqueId());
-
+        if (gui == null)
+            return;
         gui.closed();
 
         GUI.GUIByUUID.remove(event.getPlayer().getUniqueId());