diff --git a/util/item/AEItemDef.java b/util/item/AEItemDef.java
index bcdd2ac7..bb7800ef 100644
--- a/util/item/AEItemDef.java
+++ b/util/item/AEItemDef.java
@@ -37,17 +37,20 @@ public class AEItemDef
 	static AESharedNBT lowTag = new AESharedNBT( Integer.MIN_VALUE );
 	static AESharedNBT highTag = new AESharedNBT( Integer.MAX_VALUE );
 
+	public AEItemDef(Item it) {
+		item = it;
+		itemID = System.identityHashCode( item );
+	}
+
 	public AEItemDef copy()
 	{
-		AEItemDef t = new AEItemDef();
+		AEItemDef t = new AEItemDef( item );
 		t.def = def;
-		t.item = item;
 		t.damageValue = damageValue;
 		t.dspDamage = dspDamage;
 		t.maxDamage = maxDamage;
 		t.tagCompound = tagCompound;
 		t.isOre = isOre;
-		t.itemID = itemID;
 		return t;
 	}
 
diff --git a/util/item/AEItemStack.java b/util/item/AEItemStack.java
index 3f7dce11..5defa307 100644
--- a/util/item/AEItemStack.java
+++ b/util/item/AEItemStack.java
@@ -57,8 +57,7 @@ public final class AEItemStack extends AEStack<IAEItemStack> implements IAEItemS
 		if ( is == null )
 			throw new RuntimeException( "Invalid Itemstack." );
 
-		def = new AEItemDef();
-		def.item = is.getItem();
+		def = new AEItemDef( is.getItem() );
 
 		if ( def.item == null )
 			throw new RuntimeException( "This ItemStack is bad, it has a null item." );