diff --git a/core/src/mindustry/world/blocks/defense/turrets/ItemTurret.java b/core/src/mindustry/world/blocks/defense/turrets/ItemTurret.java
index 58d0aed084..8e1a2c0ad5 100644
--- a/core/src/mindustry/world/blocks/defense/turrets/ItemTurret.java
+++ b/core/src/mindustry/world/blocks/defense/turrets/ItemTurret.java
@@ -136,6 +136,7 @@ public class ItemTurret extends Turret{
             }
 
             BulletType type = ammoTypes.get(item);
+            if(type == null) return;
             totalAmmo += type.ammoMultiplier;
 
             //find ammo entry by type