diff --git a/src/data/ability.ts b/src/data/ability.ts
index 613dda5758e..87673b64162 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -4687,7 +4687,7 @@ export class TerrainEventTypeChangeAbAttr extends PostSummonAbAttr {
     super(true);
   }
 
-  apply(pokemon: Pokemon, _passive: boolean, _simulated: boolean, _cancelled: Utils.BooleanHolder, _args: any[]): boolean {
+  override apply(pokemon: Pokemon, _passive: boolean, _simulated: boolean, _cancelled: Utils.BooleanHolder, _args: any[]): boolean {
     if (pokemon.isTerastallized()) {
       return false;
     }
@@ -4733,7 +4733,7 @@ export class TerrainEventTypeChangeAbAttr extends PostSummonAbAttr {
     return typeChange;
   }
 
-  applyPostSummon(pokemon: Pokemon, passive: boolean, simulated: boolean, args: any[]): boolean | Promise<boolean> {
+  override applyPostSummon(pokemon: Pokemon, passive: boolean, simulated: boolean, args: any[]): boolean | Promise<boolean> {
     if (pokemon.scene.arena.getTerrainType() !== TerrainType.NONE) {
       return this.apply(pokemon, passive, simulated, new Utils.BooleanHolder(false), []);
     }