diff --git a/packages/backend/src/core/activitypub/models/ApPersonService.ts b/packages/backend/src/core/activitypub/models/ApPersonService.ts
index a68e38cd6..a5e5741dc 100644
--- a/packages/backend/src/core/activitypub/models/ApPersonService.ts
+++ b/packages/backend/src/core/activitypub/models/ApPersonService.ts
@@ -461,6 +461,7 @@ export class ApPersonService implements OnModuleInit {
 			tags,
 			isBot: getApType(object) === 'Service',
 			isCat: (person as any).isCat === true,
+			speakAsCat: (person as any).speakAsCat != null ? (person as any).speakAsCat === true : (person as any).isCat === true,
 			isLocked: person.manuallyApprovesFollowers,
 			movedToUri: person.movedTo ?? null,
 			alsoKnownAs: person.alsoKnownAs ?? null,