diff --git a/packages/backend/src/server/api/endpoints/admin/suspend-user.ts b/packages/backend/src/server/api/endpoints/admin/suspend-user.ts
index bea1bdc4ed..3b61382017 100644
--- a/packages/backend/src/server/api/endpoints/admin/suspend-user.ts
+++ b/packages/backend/src/server/api/endpoints/admin/suspend-user.ts
@@ -42,10 +42,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				throw new Error('user not found');
 			}
 
+			if (user.isSuspended) {
+				throw new Error('user already suspended');
+			}
+
 			if (await this.roleService.isModerator(user)) {
 				throw new Error('cannot suspend moderator account');
 			}
-
 			await this.userSuspendService.suspend(user, me);
 		});
 	}