diff --git a/core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java b/core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java
index 8cde4852c7..3459e3b18e 100644
--- a/core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java
+++ b/core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java
@@ -35,14 +35,14 @@ public interface BuilderTrait extends Entity, TeamTrait{
         float finalPlaceDst = state.rules.infiniteResources ? Float.MAX_VALUE : placeDistance;
         Unit unit = (Unit)this;
 
-        //remove already completed build requests
-        removal.clear();
-        removal.addAll(buildQueue());
-
-        Structs.filter(buildQueue(), req -> {
+        Iterator<BuildRequest> it = buildQueue().iterator();
+        while(it.hasNext()){
+            BuildRequest req = it.next();
             Tile tile = world.tile(req.x, req.y);
-            return tile == null || (req.breaking && tile.block() == Blocks.air) || (!req.breaking && (tile.rotation() == req.rotation || !req.block.rotate) && tile.block() == req.block);
-        });
+            if(tile == null || (req.breaking && tile.block() == Blocks.air) || (!req.breaking && (tile.rotation() == req.rotation || !req.block.rotate) && tile.block() == req.block)){
+                it.remove();
+            }
+        }
 
         TileEntity core = unit.getClosestCore();
 
@@ -230,7 +230,6 @@ public interface BuilderTrait extends Entity, TeamTrait{
 
     //due to iOS weirdness, this is apparently required
     class BuildDataStatic{
-        static Array<BuildRequest> removal = new Array<>();
         static Vector2[] tmptr = new Vector2[]{new Vector2(), new Vector2(), new Vector2(), new Vector2()};
     }