--- a/dom/media/MediaStreamTrack.cpp
+++ b/dom/media/MediaStreamTrack.cpp
@@ -13,17 +13,17 @@
 #include "systemservices/MediaUtils.h"
 
 #include "mozilla/dom/Promise.h"
 
 #ifdef LOG
 #undef LOG
 #endif
 
-static PRLogModuleInfo* gMediaStreamTrackLog;
+static mozilla::LazyLogModule gMediaStreamTrackLog("MediaStreamTrack");
 #define LOG(type, msg) MOZ_LOG(gMediaStreamTrackLog, type, msg)
 
 namespace mozilla {
 namespace dom {
 
 NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaStreamTrackSource)
 NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaStreamTrackSource)
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaStreamTrackSource)
@@ -115,20 +115,16 @@ MediaStreamTrack::MediaStreamTrack(DOMMe
   : mOwningStream(aStream), mTrackID(aTrackID),
     mInputTrackID(aInputTrackID), mSource(aSource),
     mPrincipal(aSource->GetPrincipal()),
     mReadyState(MediaStreamTrackState::Live),
     mEnabled(true), mRemote(aSource->IsRemote()),
     mConstraints(aConstraints)
 {
 
-  if (!gMediaStreamTrackLog) {
-    gMediaStreamTrackLog = PR_NewLogModule("MediaStreamTrack");
-  }
-
   GetSource().RegisterSink(this);
 
   mPrincipalHandleListener = new PrincipalHandleListener(this);
   AddListener(mPrincipalHandleListener);
 
   nsresult rv;
   nsCOMPtr<nsIUUIDGenerator> uuidgen =
     do_GetService("@mozilla.org/uuid-generator;1", &rv);