diff --git a/packages/backend/src/core/entities/AntennaEntityService.ts b/packages/backend/src/core/entities/AntennaEntityService.ts
index 4a17a3d80f..e770028af3 100644
--- a/packages/backend/src/core/entities/AntennaEntityService.ts
+++ b/packages/backend/src/core/entities/AntennaEntityService.ts
@@ -43,6 +43,7 @@ export class AntennaEntityService {
 			withFile: antenna.withFile,
 			isActive: antenna.isActive,
 			hasUnreadNote: false, // TODO
+			notify: false, // 後方互換性のため
 		};
 	}
 }
diff --git a/packages/backend/src/models/json-schema/antenna.ts b/packages/backend/src/models/json-schema/antenna.ts
index c4ac358fa6..b5b9a5b42c 100644
--- a/packages/backend/src/models/json-schema/antenna.ts
+++ b/packages/backend/src/models/json-schema/antenna.ts
@@ -95,5 +95,10 @@ export const packedAntennaSchema = {
 			optional: false, nullable: false,
 			default: false,
 		},
+		notify: {
+			type: 'boolean',
+			optional: false, nullable: false,
+			default: false,
+		},
 	},
 } as const;