diff --git a/os/rt/include/chmtx.h b/os/rt/include/chmtx.h
index 069e146cf..b4df78bcf 100644
--- a/os/rt/include/chmtx.h
+++ b/os/rt/include/chmtx.h
@@ -132,6 +132,22 @@ static inline bool chMtxQueueNotEmptyS(mutex_t *mp) {
   return queue_notempty(&mp->queue);
 }
 
+/**
+ * @brief   Returns the mutex owner thread.
+ *
+ * @param[out] mp       pointer to a @p mutex_t structure
+ * @return              The owner thread.
+ * @retval NULL         if the mutex is not owned.
+ *
+ * @iclass
+ */
+static inline thread_t *chMtxGetOwnerI(mutex_t *mp) {
+
+  chDbgCheckClassI();
+
+  return mp->owner;
+}
+
 /**
  * @brief   Returns the next mutex in the mutexes stack of the current thread.
  *
diff --git a/readme.txt b/readme.txt
index 940e497a5..5121324fc 100644
--- a/readme.txt
+++ b/readme.txt
@@ -75,6 +75,7 @@
 *****************************************************************************
 
 *** Next ***
+- NEW: Added a new function chMtxGetOwnerI() to RT mutexes subsystem.
 - NEW: STM32L433 added to STM32L4xx HAL.
 - CHG: chFifoObjectInit() renamed to chFifoObjectInitAligned(). Added a new
        chFifoObjectInit() without the alignment parameter.