diff --git a/src/main/java/net/knarcraft/knargui/GUIListener.java b/src/main/java/net/knarcraft/knargui/GUIListener.java
index 8e60a16..1856f65 100644
--- a/src/main/java/net/knarcraft/knargui/GUIListener.java
+++ b/src/main/java/net/knarcraft/knargui/GUIListener.java
@@ -6,6 +6,7 @@ import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryCloseEvent;
+import org.bukkit.event.inventory.InventoryType;
 import org.bukkit.event.player.PlayerQuitEvent;
 
 /**
@@ -36,7 +37,8 @@ public class GUIListener implements Listener {
         AbstractGUI gui = GUIRegistry.getOpenGUI(player);
 
         //Not our GUI
-        if (gui == null) {
+        if (gui == null || event.getClickedInventory() == null ||
+                event.getClickedInventory().getType() == InventoryType.PLAYER) {
             return;
         }