diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index b110fc57f733064ae6155f56fd325090569548f2..7a70ddf543a75e153d952985398f0728733de1dc 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1328,7 +1328,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
 		return -EAGAIN;
 	}
 
-       BUG_ON(rt_mutex_real_waiter(task->pi_blocked_on));
+	BUG_ON(rt_mutex_real_waiter(task->pi_blocked_on));
 
 	waiter->task = task;
 	waiter->lock = lock;