diff --git a/src/thread.c b/src/thread.c
index 74a573b78f..19ab5549c8 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -590,7 +590,7 @@ RTM_EXPORT(rt_thread_delay_until);
 /**
  * This function will let current thread delay for some milliseconds.
  *
- * @param tick the delay time
+ * @param ms the delay ms time
  *
  * @return RT_EOK
  */