diff --git a/src/main/java/com/minecraftabnormals/environmental/common/inventory/SlabfishInventory.java b/src/main/java/com/minecraftabnormals/environmental/common/inventory/SlabfishInventory.java
index 062c4acfe..72fad2479 100644
--- a/src/main/java/com/minecraftabnormals/environmental/common/inventory/SlabfishInventory.java
+++ b/src/main/java/com/minecraftabnormals/environmental/common/inventory/SlabfishInventory.java
@@ -45,7 +45,7 @@ public int getSlotStackLimit(int index) {
 
 	@Override
 	public int getSizeInventory() {
-		return 3 + (this.getStackInSlot(1).getItem().isIn(Tags.Items.CHESTS_WOODEN) ? 15 : 0);
+		return 3 + (this.slabfish.hasBackpack() || this.getStackInSlot(1).getItem().isIn(Tags.Items.CHESTS_WOODEN) ? 15 : 0);
 	}
 
 	@Override