diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 78069895032a9abb38fe19415a7faf3e7d01b884..649dc9d3951a5fed57930769957552841528f784 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -963,7 +963,6 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
 		return -EDEADLK;
 
 	raw_spin_lock(&task->pi_lock);
-	rt_mutex_adjust_prio(task);
 	waiter->task = task;
 	waiter->lock = lock;
 	waiter->prio = task->prio;