From 21c1f1a9a40b9e18b7157afc802535b199d6bdda Mon Sep 17 00:00:00 2001
From: Xavion3 <xavion333@gmail.com>
Date: Thu, 30 Jan 2025 13:55:38 +1100
Subject: [PATCH] Update src/data/pokemon-species.ts

Co-authored-by: Amani H. <109637146+xsn34kzx@users.noreply.github.com>
---
 src/data/pokemon-species.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/data/pokemon-species.ts b/src/data/pokemon-species.ts
index 5a8b628baa5..f2ab2f6520f 100644
--- a/src/data/pokemon-species.ts
+++ b/src/data/pokemon-species.ts
@@ -237,7 +237,7 @@ export abstract class PokemonSpeciesForm {
    * @returns The id of the ability
    */
   getPassiveAbility(formIndex?: number): Abilities {
-    if (formIndex === undefined) {
+    if (Utils.isNullOrUndefined(formIndex)) {
       formIndex = this.formIndex;
     }
     let starterSpeciesId = this.speciesId;