diff --git a/core/src/mindustry/entities/units/Hivemind.java b/core/src/mindustry/entities/units/Hivemind.java
index 3fdca472da..dd98b8865a 100644
--- a/core/src/mindustry/entities/units/Hivemind.java
+++ b/core/src/mindustry/entities/units/Hivemind.java
@@ -4,6 +4,7 @@ import arc.*;
 import arc.util.*;
 import arc.struct.*;
 import mindustry.entities.type.base.*;
+import mindustry.world.*;
 
 import static mindustry.Vars.*;
 
@@ -11,16 +12,27 @@ public class Hivemind{
     private static long lastFrameUpdated = -1;
     private static Interval timer = new Interval(1);
 
+    private static ObjectMap<Tile, CraterUnit> on = new ObjectMap<>();
+
     public static void update(){
         if(Core.graphics.getFrameId() == lastFrameUpdated) return;
         lastFrameUpdated = Core.graphics.getFrameId();
         if(!timer.get(30)) return;
 
+        on.clear();
+
         ObjectSet<CraterUnit> craters = new ObjectSet<>();
         unitGroup.all().each(e -> e instanceof CraterUnit, crater -> craters.add((CraterUnit)crater));
 
         craters.each(crater -> {
-            crater.purpose = crater.aspires();
+            on.put(crater.on(), crater);
+        });
+
+        craters.each(crater -> {
+            if(!on.containsKey(crater.aspires())){
+                crater.purpose = crater.aspires();
+                on.put(crater.aspires(), crater);
+            };
         });
     }
 }