diff --git a/core/src/mindustry/world/blocks/production/SolidPump.java b/core/src/mindustry/world/blocks/production/SolidPump.java
index 395420069e..13db9f2e2c 100644
--- a/core/src/mindustry/world/blocks/production/SolidPump.java
+++ b/core/src/mindustry/world/blocks/production/SolidPump.java
@@ -5,6 +5,7 @@ import arc.graphics.g2d.Draw;
 import arc.graphics.g2d.TextureRegion;
 import arc.math.Mathf;
 import arc.util.*;
+import arc.util.ArcAnnotate.*;
 import mindustry.content.Fx;
 import mindustry.content.Liquids;
 import mindustry.entities.Effects;
@@ -26,7 +27,7 @@ public class SolidPump extends Pump{
     public float updateEffectChance = 0.02f;
     public float rotateSpeed = 1f;
     /** Attribute that is checked when calculating output. */
-    public Attribute attribute;
+    public @Nullable Attribute attribute;
 
     public SolidPump(String name){
         super(name);
@@ -64,7 +65,9 @@ public class SolidPump extends Pump{
 
         stats.remove(BlockStat.output);
         stats.add(BlockStat.output, result, 60f * pumpAmount, true);
-        stats.add(BlockStat.affinities, attribute);
+        if(attribute != null){
+            stats.add(BlockStat.affinities, attribute);
+        }
     }
 
     @Override