diff --git a/packages/backend/src/server/api/endpoints/admin/invite/create.ts b/packages/backend/src/server/api/endpoints/admin/invite/create.ts
index 4a22fd482..c6ee45735 100644
--- a/packages/backend/src/server/api/endpoints/admin/invite/create.ts
+++ b/packages/backend/src/server/api/endpoints/admin/invite/create.ts
@@ -33,13 +33,7 @@ export const meta = {
 		items: {
 			type: 'object',
 			optional: false, nullable: false,
-			properties: {
-				code: {
-					type: 'string',
-					optional: false, nullable: false,
-					example: 'GR6S02ERUA5VR',
-				},
-			},
+			ref: 'InviteCode',
 		},
 	},
 } as const;
diff --git a/packages/backend/src/server/api/endpoints/admin/invite/list.ts b/packages/backend/src/server/api/endpoints/admin/invite/list.ts
index f25d3fcb3..ff57940d4 100644
--- a/packages/backend/src/server/api/endpoints/admin/invite/list.ts
+++ b/packages/backend/src/server/api/endpoints/admin/invite/list.ts
@@ -21,6 +21,7 @@ export const meta = {
 		items: {
 			type: 'object',
 			optional: false, nullable: false,
+			ref: 'InviteCode',
 		},
 	},
 } as const;
diff --git a/packages/backend/src/server/api/endpoints/invite/create.ts b/packages/backend/src/server/api/endpoints/invite/create.ts
index 94836283f..d82fa50e4 100644
--- a/packages/backend/src/server/api/endpoints/invite/create.ts
+++ b/packages/backend/src/server/api/endpoints/invite/create.ts
@@ -31,13 +31,7 @@ export const meta = {
 	res: {
 		type: 'object',
 		optional: false, nullable: false,
-		properties: {
-			code: {
-				type: 'string',
-				optional: false, nullable: false,
-				example: 'GR6S02ERUA5VR',
-			},
-		},
+		ref: 'InviteCode',
 	},
 } as const;
 
diff --git a/packages/backend/src/server/api/endpoints/invite/list.ts b/packages/backend/src/server/api/endpoints/invite/list.ts
index 06139b680..2107516ce 100644
--- a/packages/backend/src/server/api/endpoints/invite/list.ts
+++ b/packages/backend/src/server/api/endpoints/invite/list.ts
@@ -9,7 +9,6 @@ import type { RegistrationTicketsRepository } from '@/models/_.js';
 import { InviteCodeEntityService } from '@/core/entities/InviteCodeEntityService.js';
 import { QueryService } from '@/core/QueryService.js';
 import { DI } from '@/di-symbols.js';
-import { ApiError } from '../../error.js';
 
 export const meta = {
 	tags: ['meta'],
@@ -23,6 +22,7 @@ export const meta = {
 		items: {
 			type: 'object',
 			optional: false, nullable: false,
+			ref: 'InviteCode',
 		},
 	},
 } as const;