diff --git a/clutter/clutter/clutter-frame-clock.c b/clutter/clutter/clutter-frame-clock.c
index 8d6f662f1..d92201713 100644
--- a/clutter/clutter/clutter-frame-clock.c
+++ b/clutter/clutter/clutter-frame-clock.c
@@ -690,6 +690,7 @@ static void
 clutter_frame_clock_dispatch (ClutterFrameClock *frame_clock,
                               int64_t            time_us)
 {
+  const ClutterFrameListenerIface *iface = frame_clock->listener.iface;
   int64_t frame_count;
   ClutterFrameResult result;
   int64_t ideal_dispatch_time_us, lateness_us;
@@ -729,11 +730,11 @@ clutter_frame_clock_dispatch (ClutterFrameClock *frame_clock,
   frame_count = frame_clock->frame_count++;
 
   COGL_TRACE_BEGIN (ClutterFrameClockEvents, "Frame Clock (before frame)");
-  if (frame_clock->listener.iface->before_frame)
+  if (iface->before_frame)
     {
-      frame_clock->listener.iface->before_frame (frame_clock,
-                                                 frame_count,
-                                                 frame_clock->listener.user_data);
+      iface->before_frame (frame_clock,
+                           frame_count,
+                           frame_clock->listener.user_data);
     }
   COGL_TRACE_END (ClutterFrameClockEvents);
 
@@ -744,9 +745,9 @@ clutter_frame_clock_dispatch (ClutterFrameClock *frame_clock,
   COGL_TRACE_END (ClutterFrameClockTimelines);
 
   COGL_TRACE_BEGIN (ClutterFrameClockFrame, "Frame Clock (frame)");
-  result = frame_clock->listener.iface->frame (frame_clock,
-                                               frame_count,
-                                               frame_clock->listener.user_data);
+  result = iface->frame (frame_clock,
+                         frame_count,
+                         frame_clock->listener.user_data);
   COGL_TRACE_END (ClutterFrameClockFrame);
 
   switch (frame_clock->state)