diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/storage/ItemMonitorBlockEntity.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/storage/ItemMonitorBlockEntity.kt
index b7137365c..44f88858b 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/storage/ItemMonitorBlockEntity.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/storage/ItemMonitorBlockEntity.kt
@@ -296,7 +296,7 @@ class ItemMonitorBlockEntity(p_155229_: BlockPos, p_155230_: BlockState) :
 		override fun stillValid(p_18946_: Player) = true
 
 		override fun getItem(p_18941_: Int): ItemStack {
-			require(p_18941_ == 1) { "Invalid slot ID: $p_18941_" }
+			require(p_18941_ == 0) { "Invalid slot ID: $p_18941_" }
 			return craftingRecipe?.resultItem?.copy() ?: ItemStack.EMPTY
 		}