diff --git a/core/src/io/anuke/mindustry/core/ThreadHandler.java b/core/src/io/anuke/mindustry/core/ThreadHandler.java
index a08c2a6185..66522df150 100644
--- a/core/src/io/anuke/mindustry/core/ThreadHandler.java
+++ b/core/src/io/anuke/mindustry/core/ThreadHandler.java
@@ -60,6 +60,9 @@ public class ThreadHandler{
     }
 
     public int getTPS(){
+        if(smoothDelta == 0f){
+            return 60;
+        }
         return (int) (60 / smoothDelta);
     }
 
diff --git a/core/src/io/anuke/mindustry/world/Build.java b/core/src/io/anuke/mindustry/world/Build.java
index 332b7d3dd3..256ffc9798 100644
--- a/core/src/io/anuke/mindustry/world/Build.java
+++ b/core/src/io/anuke/mindustry/world/Build.java
@@ -215,6 +215,6 @@ public class Build{
         Tile tile = world.tile(x, y);
         if(tile != null) tile = tile.target();
 
-        return tile != null && tile.block().canBreak(tile) && tile.breakable() && (tile.getTeam() == Team.none || tile.getTeam() == team);
+        return tile != null && tile.block().canBreak(tile) && tile.breakable() && (!tile.block().synthetic() || tile.getTeam() == team);
     }
 }