diff --git a/module/data/Actor/Hero.mjs b/module/data/Actor/Hero.mjs
index 89dc9a1..2f0dc15 100644
--- a/module/data/Actor/Hero.mjs
+++ b/module/data/Actor/Hero.mjs
@@ -1,3 +1,4 @@
+import { derivedMaximumBar } from "../helpers.mjs";
 import { gameTerms } from "../../gameTerms.mjs";
 import { sumReduce } from "../../utils/sumReduce.mjs";
 
@@ -59,14 +60,7 @@ export class HeroData extends foundry.abstract.TypeDataModel {
 					nullable: false,
 				}),
 			}),
-			guts: new fields.SchemaField({
-				value: new fields.NumberField({
-					min: 0,
-					initial: 5,
-					integer: true,
-					nullable: false,
-				}),
-			}),
+			guts: derivedMaximumBar(0, 5),
 			coin: new fields.SchemaField({
 				gold: new fields.NumberField({
 					initial: 5,
diff --git a/module/data/helpers.mjs b/module/data/helpers.mjs
index 2321503..e7c705f 100644
--- a/module/data/helpers.mjs
+++ b/module/data/helpers.mjs
@@ -19,6 +19,17 @@ export function barAttribute(min, initial, max = undefined) {
 	});
 };
 
+export function derivedMaximumBar(min, initial) {
+	return new fields.SchemaField({
+		value: new fields.NumberField({
+			min,
+			initial,
+			integer: true,
+			nullable: false,
+		}),
+	});
+};
+
 export function optionalInteger({min, initial = null, max} = {}) {
 	return new fields.NumberField({
 		min,