diff --git a/src/data/move.ts b/src/data/move.ts
index 2117d832d74..827c3716d9b 100644
--- a/src/data/move.ts
+++ b/src/data/move.ts
@@ -1686,7 +1686,7 @@ export class HitHealAttr extends MoveEffectAttr {
   constructor(healRatio?: number | null, healStat?: Stat) {
     super(true, MoveEffectTrigger.HIT);
 
-    this.healRatio = healRatio!; // TODO: is this bang correct?
+    this.healRatio = healRatio ?? 0.5;
     this.healStat = healStat ?? null;
   }
   /**