diff --git a/core/src/mindustry/entities/comp/UnitComp.java b/core/src/mindustry/entities/comp/UnitComp.java
index 6a83bbde08..097cce0130 100644
--- a/core/src/mindustry/entities/comp/UnitComp.java
+++ b/core/src/mindustry/entities/comp/UnitComp.java
@@ -37,6 +37,7 @@ abstract class UnitComp implements Healthc, Physicsc, Hitboxc, Statusc, Teamc, I
     @Import float x, y, rotation, elevation, maxHealth, drag, armor, hitSize, health, ammo, minFormationSpeed;
     @Import Team team;
     @Import int id;
+    @Import @Nullable Tile mineTile;
 
     private UnitController controller;
     UnitType type;