diff --git a/src/main/kotlin/net/axay/kspigot/inventory/InventoryGUIBuilder.kt b/src/main/kotlin/net/axay/kspigot/inventory/InventoryGUIBuilder.kt
index a90a3129..5e0bccee 100644
--- a/src/main/kotlin/net/axay/kspigot/inventory/InventoryGUIBuilder.kt
+++ b/src/main/kotlin/net/axay/kspigot/inventory/InventoryGUIBuilder.kt
@@ -43,7 +43,7 @@ class InventoryGUIBuilder<T : ForInventory>(
 }
 
 class InventoryGUIPageBuilder<T : ForInventory>(
-    val type: InventoryType<T>,
+    private val type: InventoryType<T>,
     val page: Int
 ) {