diff --git a/src/main/java/co/neeve/nae2/mixin/upgrades/gregcircuit/MixinDualityInterface.java b/src/main/java/co/neeve/nae2/mixin/upgrades/gregcircuit/MixinDualityInterface.java
index a0bc173..00fb322 100644
--- a/src/main/java/co/neeve/nae2/mixin/upgrades/gregcircuit/MixinDualityInterface.java
+++ b/src/main/java/co/neeve/nae2/mixin/upgrades/gregcircuit/MixinDualityInterface.java
@@ -24,7 +24,7 @@
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
-import java.util.List;
+import java.util.Set;
 import java.util.WeakHashMap;
 
 @Mixin(value = DualityInterface.class, remap = false)
@@ -36,7 +36,7 @@ public abstract class MixinDualityInterface {
 	@Final
 	private UpgradeInventory upgrades;
 	@Shadow
-	private List<ICraftingPatternDetails> craftingList;
+	private Set<ICraftingPatternDetails> craftingList;
 
 	@Shadow
 	protected abstract void updateCraftingList();