diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index aed50000f4..eacbd790be 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -61,6 +61,7 @@ public class ErekirTechTree{
         costMultipliers.put(Items.graphite, 9);
         //oxide is hard to make
         costMultipliers.put(Items.oxide, 0.5f);
+        costMultipliers.put(Items.carbide, 0.6f);
 
         //TODO remove
         Objective tmpNever = new Research(Items.fissileMatter);