diff --git a/aos/mutex/mutex.h b/aos/mutex/mutex.h
index a2af7ae..1a2a028 100644
--- a/aos/mutex/mutex.h
+++ b/aos/mutex/mutex.h
@@ -77,9 +77,7 @@
                  << " died but it shouldn't be able to";
     }
   }
-  ~MutexLocker() {
-    mutex_->Unlock();
-  }
+  ~MutexLocker() { mutex_->Unlock(); }
 
  private:
   Mutex *const mutex_;