--- a/dom/media/mediasink/VideoSink.cpp
+++ b/dom/media/mediasink/VideoSink.cpp
@@ -390,17 +390,17 @@ VideoSink::UpdateRenderedVideoFrames()
   // Get the current playback position.
   TimeStamp nowTime;
   const int64_t clockTime = mAudioSink->GetPosition(&nowTime);
   NS_ASSERTION(clockTime >= 0, "Should have positive clock time.");
 
   // Skip frames up to the playback position.
   int64_t lastDisplayedFrameEndTime = 0;
   while (VideoQueue().GetSize() > 0 &&
-         clockTime > VideoQueue().PeekFront()->GetEndTime()) {
+         clockTime >= VideoQueue().PeekFront()->GetEndTime()) {
     RefPtr<MediaData> frame = VideoQueue().PopFront();
     if (frame->As<VideoData>()->mSentToCompositor) {
       lastDisplayedFrameEndTime = frame->GetEndTime();
       mFrameStats.NotifyPresentedFrame();
     } else {
       mFrameStats.NotifyDecodedFrames({ 0, 0, 1 });
       VSINK_LOG_V("discarding video frame mTime=%lld clock_time=%lld",
                   frame->mTime, clockTime);