diff --git a/core/src/mindustry/entities/bullet/BulletType.java b/core/src/mindustry/entities/bullet/BulletType.java
index e749c99058..2e98d4e539 100644
--- a/core/src/mindustry/entities/bullet/BulletType.java
+++ b/core/src/mindustry/entities/bullet/BulletType.java
@@ -394,9 +394,9 @@ public class BulletType extends Content implements Cloneable{
     }
 
     public void handlePierce(Bullet b, float initialHealth, float x, float y){
-        float sub = Math.max(initialHealth*pierceDamageFactor, 0);
+        float sub = Mathf.zero(pierceDamageFactor) ? 0f : Math.max(initialHealth * pierceDamageFactor, 0);
         //subtract health from each consecutive pierce
-        b.damage -= Math.min(b.damage, sub);
+        b.damage -= Float.isNaN(sub) ? b.damage : Math.min(b.damage, sub);
 
         if(removeAfterPierce && b.damage <= 0){
             b.hit = true;