diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/container/slotted/ContainerSlot.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/container/slotted/ContainerSlot.kt
index 7d4821597..178ee81f5 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/container/slotted/ContainerSlot.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/container/slotted/ContainerSlot.kt
@@ -133,6 +133,13 @@ open class ContainerSlot(
 			override val maxStackSize: Int
 				get() = this@Simple.maxStackSize
 
+			override fun maxStackSize(item: ItemStack): Int {
+				if (maxStackSize == Int.MAX_VALUE)
+					return Int.MAX_VALUE
+
+				return super.maxStackSize(item)
+			}
+
 			override fun notifyChanged(old: ItemStack) {
 				super.notifyChanged(old)
 				listener(item, old)
@@ -160,6 +167,7 @@ open class ContainerSlot(
 		}
 	}
 
+
 	companion object {
 		private val LOGGER = LogManager.getLogger()
 	}
diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/container/slotted/FilteredContainerSlot.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/container/slotted/FilteredContainerSlot.kt
index 4e2d50f3d..11a59da02 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/container/slotted/FilteredContainerSlot.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/container/slotted/FilteredContainerSlot.kt
@@ -68,6 +68,13 @@ open class FilteredContainerSlot(
 			override val maxStackSize: Int
 				get() = this@Simple.maxStackSize
 
+			override fun maxStackSize(item: ItemStack): Int {
+				if (maxStackSize == Int.MAX_VALUE)
+					return Int.MAX_VALUE
+
+				return super.maxStackSize(item)
+			}
+
 			override fun notifyChanged(old: ItemStack) {
 				super.notifyChanged(old)
 				listener(item, old)