diff --git a/source/module/items/M5Item.ts b/source/module/items/M5Item.ts
index 550f6a8..d25aaf0 100644
--- a/source/module/items/M5Item.ts
+++ b/source/module/items/M5Item.ts
@@ -110,7 +110,7 @@ export class M5Item extends Item {
 			if (actor) {
 				const actorCalc = character.derivedData({ weapons: true, defensiveWeapons: true, armor: true, items: true, spells: true });
 				if (actorCalc) {
-					calc.ew += actorCalc.stats.spellCasting.value;
+					calc.ew = actorCalc.stats.spellCasting.value;
 				}
 			}
 		} else if (itemType === "item") {