diff --git a/intern/ghost/GHOST_C-api.h b/intern/ghost/GHOST_C-api.h
index d7137509e5e..142796c88d5 100644
--- a/intern/ghost/GHOST_C-api.h
+++ b/intern/ghost/GHOST_C-api.h
@@ -83,8 +83,8 @@ extern GHOST_TSuccess GHOST_DisposeEventConsumer(GHOST_EventConsumerHandle consu
 
 /**
  * Returns the system time.
- * Returns the number of milliseconds since the start of the system process.
- * Based on ANSI clock() routine.
+ * Returns the number of milliseconds since the start of the system.
+ *
  * \param systemhandle: The handle to the system.
  * \return The number of milliseconds.
  */
diff --git a/intern/ghost/GHOST_ISystem.hh b/intern/ghost/GHOST_ISystem.hh
index 9ecde8bdaa6..ec80b9ea395 100644
--- a/intern/ghost/GHOST_ISystem.hh
+++ b/intern/ghost/GHOST_ISystem.hh
@@ -170,8 +170,10 @@ class GHOST_ISystem {
 
   /**
    * Returns the system time.
-   * Returns the number of milliseconds since the start of the system process.
-   * Based on ANSI clock() routine.
+   * Returns the number of milliseconds since the start of the system.
+   * \note The exact method used is platform dependent however monotonic methods should be used
+   * instead of wall-clock time.
+   *
    * \return The number of milliseconds.
    */
   virtual uint64_t getMilliSeconds() const = 0;