diff --git a/src/data/ability.ts b/src/data/ability.ts
index 649354e0bee..c9aaeddd593 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -917,7 +917,7 @@ export class PostDefendApplyBattlerTagAbAttr extends PostDefendAbAttr {
 }
 
 export class PostDefendTypeChangeAbAttr extends PostDefendAbAttr {
-  private type: Type;
+  private type: PokemonType;
 
   override canApplyPostDefend(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult, args: any[]): boolean {
     this.type = attacker.getMoveType(move);