diff --git a/core/src/mindustry/world/blocks/units/Reconstructor.java b/core/src/mindustry/world/blocks/units/Reconstructor.java
index f53636f1a2..77647f2909 100644
--- a/core/src/mindustry/world/blocks/units/Reconstructor.java
+++ b/core/src/mindustry/world/blocks/units/Reconstructor.java
@@ -97,6 +97,10 @@ public class Reconstructor extends UnitBlock{
         super.init();
     }
 
+    public void addUpgrade(UnitType from, UnitType to){
+        upgrades.add(new UnitType[]{from, to});
+    }
+
     public class ReconstructorBuild extends UnitBuild{
 
         public float fraction(){