1 files changed, 3 insertions, 0 deletions
diff --git a/os/rt/include/chmtx.h b/os/rt/include/chmtx.h
index ecfffae92..99eeb6f02 100644
--- a/os/rt/include/chmtx.h
+++ b/os/rt/include/chmtx.h
@@ -121,6 +121,9 @@ extern "C" {
  * @brief   Returns @p true if the mutex queue contains at least a waiting
  *          thread.
  *
+ * @param[out] mp       pointer to a @p mutex_t structure
+ * @return              The mutex queue status.
+ *
  * @deprecated
  * @sclass
  */