diff --git a/clutter/clutter-timeline.c b/clutter/clutter-timeline.c
index 074f0cc61..1647503b2 100644
--- a/clutter/clutter-timeline.c
+++ b/clutter/clutter-timeline.c
@@ -1378,7 +1378,7 @@ collect_markers (const gchar *key,
  * @msecs: the time to check, or -1
  * @n_markers: the number of markers returned
  *
- * Retrieves the list of markers at time @msecs. If @frame_num is a
+ * Retrieves the list of markers at time @msecs. If @msecs is a
  * negative integer, all the markers attached to @timeline will be
  * returned.
  *
diff --git a/clutter/clutter-timeline.h b/clutter/clutter-timeline.h
index 95f2bfa9f..adc0f90d8 100644
--- a/clutter/clutter-timeline.h
+++ b/clutter/clutter-timeline.h
@@ -100,7 +100,7 @@ struct _ClutterTimelineClass
 
   void (*marker_reached) (ClutterTimeline *timeline,
                           const gchar     *marker_name,
-                          gint             frame_num);
+                          gint             msecs);
 
   /*< private >*/
   void (*_clutter_timeline_1) (void);