diff --git a/dom/media/MediaDecoderReader.h b/dom/media/MediaDecoderReader.h
index 56163df6d711..21df8d719930 100644
--- a/dom/media/MediaDecoderReader.h
+++ b/dom/media/MediaDecoderReader.h
@@ -164,7 +164,7 @@ public:
   // Moves the decode head to aTime microseconds. aEndTime denotes the end
   // time of the media in usecs. This is only needed for OggReader, and should
   // probably be removed somehow.
-  virtual RefPtr<SeekPromise> Seek(SeekTarget aTarget, int64_t aEndTime) = 0;
+  virtual RefPtr<SeekPromise> Seek(const SeekTarget& aTarget, int64_t aEndTime) = 0;
 
   virtual void SetCDMProxy(CDMProxy* aProxy) {}
 
diff --git a/dom/media/MediaDecoderReaderWrapper.cpp b/dom/media/MediaDecoderReaderWrapper.cpp
index 67eb1fc23559..ba8ceccb3c57 100644
--- a/dom/media/MediaDecoderReaderWrapper.cpp
+++ b/dom/media/MediaDecoderReaderWrapper.cpp
@@ -122,13 +122,16 @@ MediaDecoderReaderWrapper::IsWaitingVideoData() const
 }
 
 RefPtr<MediaDecoderReader::SeekPromise>
-MediaDecoderReaderWrapper::Seek(SeekTarget aTarget, media::TimeUnit aEndTime)
+MediaDecoderReaderWrapper::Seek(const SeekTarget& aTarget,
+                                const media::TimeUnit& aEndTime)
 {
   MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
-  aTarget.SetTime(aTarget.GetTime() + StartTime());
-  return InvokeAsync(mReader->OwnerThread(), mReader.get(), __func__,
-                     &MediaDecoderReader::Seek, aTarget,
-                     aEndTime.ToMicroseconds());
+  SeekTarget adjustedTarget = aTarget;
+  adjustedTarget.SetTime(adjustedTarget.GetTime() + StartTime());
+  return InvokeAsync<SeekTarget&&, int64_t>(
+           mReader->OwnerThread(), mReader.get(), __func__,
+           &MediaDecoderReader::Seek,
+           Move(adjustedTarget), aEndTime.ToMicroseconds());
 }
 
 void
diff --git a/dom/media/MediaDecoderReaderWrapper.h b/dom/media/MediaDecoderReaderWrapper.h
index 8735c3060068..a1da5029ca19 100644
--- a/dom/media/MediaDecoderReaderWrapper.h
+++ b/dom/media/MediaDecoderReaderWrapper.h
@@ -68,7 +68,8 @@ public:
   bool IsWaitingAudioData() const;
   bool IsWaitingVideoData() const;
 
-  RefPtr<SeekPromise> Seek(SeekTarget aTarget, media::TimeUnit aEndTime);
+  RefPtr<SeekPromise> Seek(const SeekTarget& aTarget,
+                           const media::TimeUnit& aEndTime);
   RefPtr<BufferedUpdatePromise> UpdateBufferedWithPromise();
   RefPtr<ShutdownPromise> Shutdown();
 
diff --git a/dom/media/MediaFormatReader.cpp b/dom/media/MediaFormatReader.cpp
index 53761b9784cb..cca70a52a39c 100644
--- a/dom/media/MediaFormatReader.cpp
+++ b/dom/media/MediaFormatReader.cpp
@@ -1928,7 +1928,7 @@ MediaFormatReader::OnVideoSkipFailed(MediaTrackDemuxer::SkipFailureHolder aFailu
 }
 
 RefPtr<MediaDecoderReader::SeekPromise>
-MediaFormatReader::Seek(SeekTarget aTarget, int64_t aUnused)
+MediaFormatReader::Seek(const SeekTarget& aTarget, int64_t aUnused)
 {
   MOZ_ASSERT(OnTaskQueue());
 
@@ -1950,7 +1950,7 @@ MediaFormatReader::Seek(SeekTarget aTarget, int64_t aUnused)
     return SeekPromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
   }
 
-  SetSeekTarget(Move(aTarget));
+  SetSeekTarget(aTarget);
 
   RefPtr<SeekPromise> p = mSeekPromise.Ensure(__func__);
 
diff --git a/dom/media/MediaFormatReader.h b/dom/media/MediaFormatReader.h
index 962ff0b55274..7ae008df1b71 100644
--- a/dom/media/MediaFormatReader.h
+++ b/dom/media/MediaFormatReader.h
@@ -48,7 +48,7 @@ public:
   void ReadUpdatedMetadata(MediaInfo* aInfo) override;
 
   RefPtr<SeekPromise>
-  Seek(SeekTarget aTarget, int64_t aUnused) override;
+  Seek(const SeekTarget& aTarget, int64_t aUnused) override;
 
 protected:
   void NotifyDataArrivedInternal() override;
diff --git a/dom/media/android/AndroidMediaReader.cpp b/dom/media/android/AndroidMediaReader.cpp
index 5dbd538885fb..c5333f8345ca 100644
--- a/dom/media/android/AndroidMediaReader.cpp
+++ b/dom/media/android/AndroidMediaReader.cpp
@@ -314,7 +314,7 @@ bool AndroidMediaReader::DecodeAudioData()
 }
 
 RefPtr<MediaDecoderReader::SeekPromise>
-AndroidMediaReader::Seek(SeekTarget aTarget, int64_t aEndTime)
+AndroidMediaReader::Seek(const SeekTarget& aTarget, int64_t aEndTime)
 {
   MOZ_ASSERT(OnTaskQueue());
 
diff --git a/dom/media/android/AndroidMediaReader.h b/dom/media/android/AndroidMediaReader.h
index def85a343bd1..acf34bd675d8 100644
--- a/dom/media/android/AndroidMediaReader.h
+++ b/dom/media/android/AndroidMediaReader.h
@@ -48,7 +48,7 @@ public:
   bool DecodeVideoFrame(bool &aKeyframeSkip, int64_t aTimeThreshold) override;
 
   nsresult ReadMetadata(MediaInfo* aInfo, MetadataTags** aTags) override;
-  RefPtr<SeekPromise> Seek(SeekTarget aTarget, int64_t aEndTime) override;
+  RefPtr<SeekPromise> Seek(const SeekTarget& aTarget, int64_t aEndTime) override;
 
   RefPtr<ShutdownPromise> Shutdown() override;
 
diff --git a/dom/media/directshow/DirectShowReader.cpp b/dom/media/directshow/DirectShowReader.cpp
index cacf6f8de8ed..ba27548b60f8 100644
--- a/dom/media/directshow/DirectShowReader.cpp
+++ b/dom/media/directshow/DirectShowReader.cpp
@@ -320,7 +320,7 @@ DirectShowReader::DecodeVideoFrame(bool &aKeyframeSkip,
 }
 
 RefPtr<MediaDecoderReader::SeekPromise>
-DirectShowReader::Seek(SeekTarget aTarget, int64_t aEndTime)
+DirectShowReader::Seek(const SeekTarget& aTarget, int64_t aEndTime)
 {
   nsresult res = SeekInternal(aTarget.GetTime().ToMicroseconds());
   if (NS_FAILED(res)) {
diff --git a/dom/media/directshow/DirectShowReader.h b/dom/media/directshow/DirectShowReader.h
index e1326d416e36..b165f0939190 100644
--- a/dom/media/directshow/DirectShowReader.h
+++ b/dom/media/directshow/DirectShowReader.h
@@ -58,7 +58,7 @@ public:
                         MetadataTags** aTags) override;
 
   RefPtr<SeekPromise>
-  Seek(SeekTarget aTarget, int64_t aEndTime) override;
+  Seek(const SeekTarget& aTarget, int64_t aEndTime) override;
 
   static const GUID CLSID_MPEG_LAYER_3_DECODER_FILTER;