diff --git a/gdk/gdkframeclockidle.c b/gdk/gdkframeclockidle.c
index 1d11ae4fe7..29cd57975f 100644
--- a/gdk/gdkframeclockidle.c
+++ b/gdk/gdkframeclockidle.c
@@ -317,6 +317,7 @@ gdk_frame_clock_paint_idle (void *data)
   GdkFrameClockIdlePrivate *priv = clock_idle->priv;
   gboolean skip_to_resume_events;
   GdkFrameTimings *timings = NULL;
+  gint64 before = g_get_monotonic_time ();
 
   priv->paint_idle_id = 0;
   priv->in_paint_idle = TRUE;
@@ -500,6 +501,9 @@ gdk_frame_clock_paint_idle (void *data)
   if (priv->freeze_count == 0)
     priv->sleep_serial = get_sleep_serial ();
 
+  if (gdk_profiler_is_running ())
+    gdk_profiler_add_mark (before * 1000, (g_get_monotonic_time () - before) * 1000, "frameclock", "paint_idle");
+
   return FALSE;
 }