diff --git a/kernel/signal.c b/kernel/signal.c
index 29e233fd7a0f8a1b29dc6fbd06a1f4f2795f0daf..7165af5f1b116fed3b5c5751d83e7e355e27ddab 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2711,8 +2711,8 @@ SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, set,
 /**
  *  sys_rt_sigaction - alter an action taken by a process
  *  @sig: signal to be sent
- *  @act: the thread group ID of the thread
- *  @oact: the PID of the thread
+ *  @act: new sigaction
+ *  @oact: used to save the previous sigaction
  *  @sigsetsize: size of sigset_t type
  */
 SYSCALL_DEFINE4(rt_sigaction, int, sig,