diff --git a/packages/backend/src/core/RoleService.ts b/packages/backend/src/core/RoleService.ts
index f15c5ab45f..4a65cd9342 100644
--- a/packages/backend/src/core/RoleService.ts
+++ b/packages/backend/src/core/RoleService.ts
@@ -739,12 +739,15 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 
 	@bindThis
 	public async clone(role: MiRole, moderator?: MiUser): Promise<MiRole> {
-		let newName = `${role.name} (cloned)`;
+		const suffix = ' (cloned)';
+		let newName = role.name;
 
-		if (newName.length > 256) {
-			newName = newName.slice(0, 256);
+		if (newName.length > 256 - suffix.length) {
+			newName = newName.slice(0, 256 - suffix.length);
 		}
 
+		newName += suffix;
+
 		return this.create({
 			...role,
 			name: newName,
diff --git a/packages/backend/test/unit/RoleService.ts b/packages/backend/test/unit/RoleService.ts
index 534556b056..5a643a6a2c 100644
--- a/packages/backend/test/unit/RoleService.ts
+++ b/packages/backend/test/unit/RoleService.ts
@@ -1025,7 +1025,7 @@ describe('RoleService', () => {
 
 			expect(clonedRole).toBeDefined();
 			expect(clonedRole.id).not.toBe(role.id);
-			expect(clonedRole.name).toBe(`${role.name} (`);
+			expect(clonedRole.name.endsWith(' (cloned)')).toBeTruthy();
 			expect(clonedRole.name.length).toBe(256);
 		});
 	});