diff --git a/src/main/java/modtweaker2/mods/thaumcraft/research/AddResearch.java b/src/main/java/modtweaker2/mods/thaumcraft/research/AddResearch.java
index ceb9888..e8be769 100644
--- a/src/main/java/modtweaker2/mods/thaumcraft/research/AddResearch.java
+++ b/src/main/java/modtweaker2/mods/thaumcraft/research/AddResearch.java
@@ -1,5 +1,6 @@
 package modtweaker2.mods.thaumcraft.research;
 
+import net.minecraft.item.ItemStack;
 import minetweaker.IUndoableAction;
 import thaumcraft.api.research.ResearchCategories;
 import thaumcraft.api.research.ResearchItem;