--- a/dom/media/webm/WebMDemuxer.cpp
+++ b/dom/media/webm/WebMDemuxer.cpp
@@ -1068,16 +1068,20 @@ WebMTrackDemuxer::Seek(const media::Time
   // Seeks to aTime. Upon success, SeekPromise will be resolved with the
   // actual time seeked to. Typically the random access point time
 
   media::TimeUnit seekTime = aTime;
   mSamples.Reset();
   mParent->SeekInternal(mType, aTime);
   nsresult rv = mParent->GetNextPacket(mType, &mSamples);
   if (NS_FAILED(rv)) {
+    if (rv == NS_ERROR_DOM_MEDIA_END_OF_STREAM) {
+      // Ignore the error for now, the next GetSample will be rejected with EOS.
+      return SeekPromise::CreateAndResolve(media::TimeUnit(), __func__);
+    }
     return SeekPromise::CreateAndReject(rv, __func__);
   }
   mNeedKeyframe = true;
 
   // Check what time we actually seeked to.
   if (mSamples.GetSize() > 0) {
     const RefPtr<MediaRawData>& sample = mSamples.First();
     seekTime = media::TimeUnit::FromMicroseconds(sample->mTime);