diff --git a/include/nuttx/signal.h b/include/nuttx/signal.h
index bc57ab6b69f..f8f80d305d6 100644
--- a/include/nuttx/signal.h
+++ b/include/nuttx/signal.h
@@ -366,7 +366,7 @@ int nxsig_kill(pid_t pid, int signo);
  *   is forever.
  *
  *   If the info argument is non-NULL, the selected signal number is stored
- *   in the si_signo member and the cause of the signal is store din the
+ *   in the si_signo member and the cause of the signal is stored in the
  *   si_code member.  The content of si_value is only meaningful if the
  *   signal was generated by sigqueue().
  *
diff --git a/sched/signal/sig_timedwait.c b/sched/signal/sig_timedwait.c
index 01c093ae2a4..b8797a515fd 100644
--- a/sched/signal/sig_timedwait.c
+++ b/sched/signal/sig_timedwait.c
@@ -195,7 +195,7 @@ void nxsig_wait_irq(FAR struct tcb_s *wtcb, int errcode)
  *   is forever.
  *
  *   If the info argument is non-NULL, the selected signal number is stored
- *   in the si_signo member and the cause of the signal is store din the
+ *   in the si_signo member and the cause of the signal is stored in the
  *   si_code member.  The content of si_value is only meaningful if the
  *   signal was generated by sigqueue() (or nxsig_queue).
  *