diff --git a/sched/mqueue/mq_timedsend.c b/sched/mqueue/mq_timedsend.c
index 0a57d16d72..94760b19a7 100644
--- a/sched/mqueue/mq_timedsend.c
+++ b/sched/mqueue/mq_timedsend.c
@@ -403,7 +403,7 @@ int nxmq_timedsend(mqd_t mqdes, FAR const char *msg, size_t msglen,
  *   On success, mq_send() returns 0 (OK); on error, -1 (ERROR)
  *   is returned, with errno set to indicate the error:
  *
- *   EAGAIN   The queue was empty, and the O_NONBLOCK flag was set for the
+ *   EAGAIN   The queue was full, and the O_NONBLOCK flag was set for the
  *            message queue description referred to by mqdes.
  *   EINVAL   Either msg or mqdes is NULL or the value of prio is invalid.
  *   EPERM    Message queue opened not opened for writing.