diff --git a/core/src/mindustry/world/Build.java b/core/src/mindustry/world/Build.java
index 86cca0d3d7..2b8542785e 100644
--- a/core/src/mindustry/world/Build.java
+++ b/core/src/mindustry/world/Build.java
@@ -37,8 +37,12 @@ public class Build{
         Block previous = tile.block();
         Block sub = ConstructBlock.get(previous.size);
 
+        Seq<Building> prevBuild = new Seq<>(1);
+        if(tile.build != null) prevBuild.add(tile.build);
+
         tile.setBlock(sub, team, rotation);
         tile.<ConstructBuild>bc().setDeconstruct(previous);
+        tile.<ConstructBuild>bc().prevBuild = prevBuild;
         tile.build.health = tile.build.maxHealth * prevPercent;
         if(unit != null && unit.isPlayer()) tile.build.lastAccessed = unit.getPlayer().name;
 
diff --git a/core/src/mindustry/world/blocks/units/Reconstructor.java b/core/src/mindustry/world/blocks/units/Reconstructor.java
index fb7b4ea1de..2ea7951e08 100644
--- a/core/src/mindustry/world/blocks/units/Reconstructor.java
+++ b/core/src/mindustry/world/blocks/units/Reconstructor.java
@@ -114,6 +114,13 @@ public class Reconstructor extends UnitBlock{
             return capacities[item.id];
         }
 
+        @Override
+        public void overwrote(Seq<Building> builds){
+            if(builds.first().block == block){
+                items.add(builds.first().items);
+            }
+        }
+
         @Override
         public void draw(){
             Draw.rect(region, x, y);