diff --git a/core/src/mindustry/logic/LVar.java b/core/src/mindustry/logic/LVar.java
index ef3b36ef8b..d417fc882d 100644
--- a/core/src/mindustry/logic/LVar.java
+++ b/core/src/mindustry/logic/LVar.java
@@ -107,7 +107,7 @@ public class LVar{
         if(isobj){
             objval = other.objval;
         }else{
-            numval = other.numval;
+            numval = invalid(other.numval) ? 0 : other.numval;
         }
     }