diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index ccc5bc0214..892a929c41 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -146,7 +146,7 @@ type Option = {
 	app?: MiApp | null;
 };
 
-type PureRenoteOption = Option & { renote: MiNote } & ({ text?: null } | { cw?: null } | { reply?: null } | { poll?: null } | { files?: null | [] });
+export type PureRenoteOption = Option & { renote: MiNote } & ({ text?: null } | { cw?: null } | { reply?: null } | { poll?: null } | { files?: null | [] });
 
 @Injectable()
 export class NoteCreateService implements OnApplicationShutdown {
@@ -824,7 +824,7 @@ export class NoteCreateService implements OnApplicationShutdown {
 	}
 
 	@bindThis
-	private isPureRenote(note: Option): note is PureRenoteOption {
+	public isPureRenote(note: Option): note is PureRenoteOption {
 		return this.isRenote(note) && !this.isQuote(note);
 	}
 
diff --git a/packages/backend/src/core/NoteEditService.ts b/packages/backend/src/core/NoteEditService.ts
index 6c456fb4a3..e5e3c38cd3 100644
--- a/packages/backend/src/core/NoteEditService.ts
+++ b/packages/backend/src/core/NoteEditService.ts
@@ -142,8 +142,6 @@ type Option = {
 	editcount?: boolean | null;
 };
 
-type PureRenoteOption = Option & { renote: MiNote } & ({ text?: null } | { cw?: null } | { reply?: null } | { poll?: null } | { files?: null | [] });
-
 @Injectable()
 export class NoteEditService implements OnApplicationShutdown {
 	#shutdownController = new AbortController();
@@ -444,7 +442,7 @@ export class NoteEditService implements OnApplicationShutdown {
 
 		if (user.host && !data.cw) {
 			await this.federatedInstanceService.fetch(user.host).then(async i => {
-				if (i.isNSFW && !this.isPureRenote(data)) {
+				if (i.isNSFW && !this.noteCreateService.isPureRenote(data)) {
 					data.cw = 'Instance is marked as NSFW';
 				}
 			});
@@ -789,11 +787,6 @@ export class NoteEditService implements OnApplicationShutdown {
 		if (!user.noindex) this.index(note);
 	}
 
-	@bindThis
-	private isPureRenote(note: Option): note is PureRenoteOption {
-		return this.isRenote(note) && !this.isQuote(note);
-	}
-
 	@bindThis
 	private isRenote(note: Option): note is Option & { renote: MiNote } {
 		return note.renote != null;