diff --git a/src/tconstruct/inventory/SlotArmorCopy.java b/src/tconstruct/inventory/SlotArmorCopy.java
index 90a52ef6150..5a21ca64fc8 100644
--- a/src/tconstruct/inventory/SlotArmorCopy.java
+++ b/src/tconstruct/inventory/SlotArmorCopy.java
@@ -5,6 +5,7 @@
 import net.minecraft.inventory.Slot;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemArmor;
+import net.minecraft.item.ItemBlock;
 import net.minecraft.item.ItemStack;
 import net.minecraft.util.Icon;
 import cpw.mods.fml.relauncher.Side;
@@ -44,7 +45,11 @@ public int getSlotStackLimit ()
     public boolean isItemValid (ItemStack par1ItemStack)
     {
         Item item = (par1ItemStack == null ? null : par1ItemStack.getItem());
-        return item != null;// && item.isValidArmor(par1ItemStack, armorType, parent.thePlayer);
+		boolean isValidArmor = false;
+		if (item instanceof ItemArmor) {
+			isValidArmor = (((ItemArmor)item).armorType == armorType);
+		}
+        return item != null && (isValidArmor || (item instanceof ItemBlock && armorType == 0));
     }
 
     @SideOnly(Side.CLIENT)