diff --git a/packages/backend/src/core/RoleService.ts b/packages/backend/src/core/RoleService.ts
index 9e14c771c0..d3c458eec7 100644
--- a/packages/backend/src/core/RoleService.ts
+++ b/packages/backend/src/core/RoleService.ts
@@ -361,9 +361,9 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 	}
 
 	@bindThis
-	public async getUserAssigns(user: MiUser | MiUser['id']) {
+	public async getUserAssigns(userOrId: MiUser | MiUser['id']) {
 		const now = Date.now();
-		const userId = typeof(user) === 'object' ? user.id : user;
+		const userId = typeof(userOrId) === 'object' ? userOrId.id : userOrId;
 		let assigns = await this.roleAssignmentByUserIdCache.fetch(userId, () => this.roleAssignmentsRepository.findBy({ userId }));
 		// 期限切れのロールを除外
 		assigns = assigns.filter(a => a.expiresAt == null || (a.expiresAt.getTime() > now));
@@ -371,12 +371,13 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 	}
 
 	@bindThis
-	public async getUserRoles(userId: MiUser | MiUser['id']) {
+	public async getUserRoles(userOrId: MiUser | MiUser['id']) {
 		const roles = await this.rolesCache.fetch(() => this.rolesRepository.findBy({}));
+		const userId = typeof(userOrId) === 'object' ? userOrId.id : userOrId;
 		const followStats = await this.cacheService.getFollowStats(userId);
-		const assigns = await this.getUserAssigns(userId);
+		const assigns = await this.getUserAssigns(userOrId);
 		const assignedRoles = roles.filter(r => assigns.map(x => x.roleId).includes(r.id));
-		const user = typeof(userId) === 'object' ? userId : roles.some(r => r.target === 'conditional') ? await this.cacheService.findUserById(userId) : null;
+		const user = typeof(userOrId) === 'object' ? userOrId : roles.some(r => r.target === 'conditional') ? await this.cacheService.findUserById(userOrId) : null;
 		const matchedCondRoles = roles.filter(r => r.target === 'conditional' && this.evalCond(user!, assignedRoles, r.condFormula, followStats));
 		return [...assignedRoles, ...matchedCondRoles];
 	}
@@ -397,7 +398,7 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 		const assignedBadgeRoles = assignedRoles.filter(r => r.asBadge);
 		const badgeCondRoles = roles.filter(r => r.asBadge && (r.target === 'conditional'));
 		if (badgeCondRoles.length > 0) {
-			const user = typeof(userId) === 'object' ? userId : roles.some(r => r.target === 'conditional') ? await this.cacheService.findUserById(userId) : null;
+			const user = typeof(userOrId) === 'object' ? userOrId : roles.some(r => r.target === 'conditional') ? await this.cacheService.findUserById(userOrId) : null;
 			const matchedBadgeCondRoles = badgeCondRoles.filter(r => this.evalCond(user!, assignedRoles, r.condFormula, followStats));
 			return [...assignedBadgeRoles, ...matchedBadgeCondRoles];
 		} else {
@@ -406,12 +407,12 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 	}
 
 	@bindThis
-	public async getUserPolicies(userId: MiUser | MiUser['id'] | null): Promise<RolePolicies> {
+	public async getUserPolicies(userOrId: MiUser | MiUser['id'] | null): Promise<RolePolicies> {
 		const basePolicies = { ...DEFAULT_POLICIES, ...this.meta.policies };
 
-		if (userId == null) return basePolicies;
+		if (userOrId == null) return basePolicies;
 
-		const roles = await this.getUserRoles(userId);
+		const roles = await this.getUserRoles(userOrId);
 
 		function calc<T extends keyof RolePolicies>(name: T, aggregate: (values: RolePolicies[T][]) => RolePolicies[T]) {
 			if (roles.length === 0) return basePolicies[name];