diff --git a/documentation/doxygen/kernel.h b/documentation/doxygen/kernel.h
index ad6471db3658..15f6983e0786 100644
--- a/documentation/doxygen/kernel.h
+++ b/documentation/doxygen/kernel.h
@@ -154,7 +154,7 @@
  * @brief error code
  *
  * The error code is defined to identify which kind of error occurs. When some
- * bad things happen, the current thread's errno will be set. see @ref _rt_errno
+ * bad things happen, the current thread's errno will be set.
  */
 
 /**@}*/
diff --git a/src/kservice.c b/src/kservice.c
index 25d7f2e7e0a4..e61bae296adf 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -461,6 +461,7 @@ rt_weak rt_err_t rt_backtrace_formatted_print(rt_ubase_t *buffer, long buflen)
 /**
  * @brief Print backtrace from frame to the given buffer
  *
+ * @param thread the thread which frame belongs to
  * @param frame where backtrace starts from. NULL if it's the current one
  * @param skip the number of frames to discarded counted from calling function.
  *             Noted that the inner most frame is always discarded and not counted,