diff --git a/src/data/mystery-encounters/utils/encounter-phase-utils.ts b/src/data/mystery-encounters/utils/encounter-phase-utils.ts
index be2b7b1a0f1..85d583fc898 100644
--- a/src/data/mystery-encounters/utils/encounter-phase-utils.ts
+++ b/src/data/mystery-encounters/utils/encounter-phase-utils.ts
@@ -291,7 +291,7 @@ export async function initBattleWithEnemyConfig(scene: BattleScene, partyConfig:
 
       // Set AI type
       if (!isNullOrUndefined(config.aiType)) {
-        enemyPokemon.aiType = config.aiType;
+        enemyPokemon.aiType = config.aiType!;
       }
 
       // Set moves