diff --git a/typings/index.d.ts b/typings/index.d.ts
index d79e51123..47123c7e8 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -1177,11 +1177,11 @@ export type CacheTypeReducer<
   RawType = CachedType,
   PresentType = CachedType | RawType,
   Fallback = PresentType | null,
-> = State extends 'cached'
+> = [State] extends ['cached']
   ? CachedType
-  : State extends 'raw'
+  : [State] extends ['raw']
   ? RawType
-  : State extends 'present'
+  : [State] extends ['present']
   ? PresentType
   : Fallback;
 
diff --git a/typings/tests.ts b/typings/tests.ts
index f132aff7b..ffe003437 100644
--- a/typings/tests.ts
+++ b/typings/tests.ts
@@ -913,6 +913,7 @@ declare const booleanValue: boolean;
 if (interaction.inGuild()) assertType<Snowflake>(interaction.guildId);
 
 client.on('interactionCreate', async interaction => {
+  assertType<Snowflake | null>(interaction.guildId);
   if (interaction.inCachedGuild()) {
     assertType<GuildMember>(interaction.member);
     // @ts-expect-error