diff --git a/module/data/Item/Weapon.mjs b/module/data/Item/Weapon.mjs
index 5e610f3..8290725 100644
--- a/module/data/Item/Weapon.mjs
+++ b/module/data/Item/Weapon.mjs
@@ -1,4 +1,4 @@
-import { optionalInteger } from "../helpers.mjs";
+import { optionalInteger, requiredInteger } from "../helpers.mjs";
 
 const { fields } = foundry.data;
 
@@ -20,6 +20,7 @@ export class WeaponData extends foundry.abstract.TypeDataModel {
 				short: optionalInteger(),
 				long: optionalInteger(),
 			}),
+			damage: requiredInteger({ min: 0, initial: 0 }),
 		};
 	};
 
diff --git a/module/data/helpers.mjs b/module/data/helpers.mjs
index 62e1590..2321503 100644
--- a/module/data/helpers.mjs
+++ b/module/data/helpers.mjs
@@ -29,3 +29,17 @@ export function optionalInteger({min, initial = null, max} = {}) {
 		integer: true,
 	});
 };
+
+export function requiredInteger({ min, initial, max } = {}) {
+	if (initial == null || typeof initial !== `number`) {
+		throw new Error(`"initial" must be a number`);
+	};
+	return new fields.NumberField({
+		min,
+		initial,
+		max,
+		required: true,
+		nullable: false,
+		integer: true,
+	});
+};