diff --git a/src/main/kotlin/net/axay/kspigot/inventory/elements/InventoryGUIButton.kt b/src/main/kotlin/net/axay/kspigot/inventory/elements/InventoryGUIButton.kt
index 8dcb1580..6e5e221a 100644
--- a/src/main/kotlin/net/axay/kspigot/inventory/elements/InventoryGUIButton.kt
+++ b/src/main/kotlin/net/axay/kspigot/inventory/elements/InventoryGUIButton.kt
@@ -8,7 +8,7 @@ open class InventoryGUIButton<T : ForInventory>(
     private val action: (InventoryGUIClickEvent<T>) -> Unit,
 ) : InventoryGUIElement<T>() {
 
-    override fun getItemStack(slot: Int) = icon
+    final override fun getItemStack(slot: Int) = icon
 
     override fun onClickElement(clickEvent: InventoryGUIClickEvent<T>) {
         clickEvent.bukkitEvent.isCancelled = true