diff --git a/src/data/challenge.ts b/src/data/challenge.ts
index 95385620df4..92fa8d4f4a0 100644
--- a/src/data/challenge.ts
+++ b/src/data/challenge.ts
@@ -12,6 +12,7 @@ import { ClassicFixedBossWaves } from "#enums/fixed-boss-waves";
 import { ModifierTier } from "#enums/modifier-tier";
 import { MoveId } from "#enums/move-id";
 import type { MoveSourceType } from "#enums/move-source-type";
+import { Nature } from "#enums/nature";
 import { PokemonType } from "#enums/pokemon-type";
 import { SpeciesId } from "#enums/species-id";
 import { TrainerType } from "#enums/trainer-type";