diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/menu/Slots.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/menu/Slots.kt
index b39f12222..431d04c73 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/menu/Slots.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/menu/Slots.kt
@@ -63,8 +63,8 @@ open class MatteryMenuSlot(container: Container, index: Int, x: Int = 0, y: Int
 	}
 
 	override fun setChanged() {
-		if (container is IMatteryContainer) {
-			(container as IMatteryContainer).setChanged(containerSlot)
+		if (container is IEnhancedContainer) {
+			(container as IEnhancedContainer).setChanged(containerSlot)
 		} else {
 			super.setChanged()
 		}