diff --git a/packages/backend/src/server/api/endpoints/i/revoke-token.ts b/packages/backend/src/server/api/endpoints/i/revoke-token.ts
index e8bb28253..98d866f86 100644
--- a/packages/backend/src/server/api/endpoints/i/revoke-token.ts
+++ b/packages/backend/src/server/api/endpoints/i/revoke-token.ts
@@ -18,7 +18,7 @@ export const paramDef = {
 	type: 'object',
 	properties: {
 		tokenId: { type: 'string', format: 'misskey:id' },
-		token: { type: 'string' },
+		token: { type: 'string', nullable: true },
 	},
 	anyOf: [
 		{ required: ['tokenId'] },