diff --git a/components/viz/service/frame_sinks/external_begin_frame_source_mac.cc b/components/viz/service/frame_sinks/external_begin_frame_source_mac.cc
index 818a46df8059fe..1070c95dcf1d93 100644
--- a/components/viz/service/frame_sinks/external_begin_frame_source_mac.cc
+++ b/components/viz/service/frame_sinks/external_begin_frame_source_mac.cc
@@ -135,4 +135,14 @@ void DelayBasedBeginFrameSourceMac::OnTimeSourceParamsUpdate(
   OnUpdateVSyncParameters(params.display_timebase, params.display_interval);
 }
 
+void DelayBasedBeginFrameSourceMac::OnTimerTick() {
+  // The VSync parameters skew over time (astonishingly quickly -- 0.1 msec per
+  // second). If too much time has elapsed since the last time the vsync
+  // parameters were calculated, re-calculate them.
+  if (base::TimeTicks::Now() >= time_source_next_update_time_) {
+    RequestTimeSourceParamsUpdate();
+  }
+  DelayBasedBeginFrameSource::OnTimerTick();
+}
+
 }  // namespace viz
diff --git a/components/viz/service/frame_sinks/external_begin_frame_source_mac.h b/components/viz/service/frame_sinks/external_begin_frame_source_mac.h
index 8148fd996402f9..15290954940a8c 100644
--- a/components/viz/service/frame_sinks/external_begin_frame_source_mac.h
+++ b/components/viz/service/frame_sinks/external_begin_frame_source_mac.h
@@ -86,6 +86,7 @@ class VIZ_COMMON_EXPORT DelayBasedBeginFrameSourceMac
 
   // BeginFrameSource implementation.
   void SetVSyncDisplayID(int64_t display_id) override;
+  void OnTimerTick() override;
 
  private:
   // Request a callback from DisplayLinkMac, and the callback function.