diff --git a/src/engine/mbEnums.java b/src/engine/mbEnums.java
index cd6cd055..1e36bdff 100644
--- a/src/engine/mbEnums.java
+++ b/src/engine/mbEnums.java
@@ -1323,7 +1323,7 @@ public class mbEnums {
         SpireBlock(mbEnums.ModBehaviorType.Flag),
         PowerCostHealth(mbEnums.ModBehaviorType.Flag);
 
-        public ModBehaviorType behaviorType;
+        public final ModBehaviorType behaviorType;
 
         ModType(ModBehaviorType behaviorType) {
             this.behaviorType = behaviorType;