diff --git a/content/media/webrtc/LoadManager.cpp b/content/media/webrtc/LoadManager.cpp
index b9cd5868c37..b2d604c4f22 100644
--- a/content/media/webrtc/LoadManager.cpp
+++ b/content/media/webrtc/LoadManager.cpp
@@ -34,8 +34,7 @@ LoadManager::LoadManager(int aLoadMeasurementInterval,
                          int aAveragingMeasurements,
                          float aHighLoadThreshold,
                          float aLowLoadThreshold)
-  : mLastSystemLoad(0),
-    mLoadSum(0.0f),
+  : mLoadSum(0.0f),
     mLoadSumMeasurements(0),
     mOveruseActive(false),
     mLoadMeasurementInterval(aLoadMeasurementInterval),
diff --git a/content/media/webrtc/LoadManager.h b/content/media/webrtc/LoadManager.h
index 91cd2388661..f9784e3298e 100644
--- a/content/media/webrtc/LoadManager.h
+++ b/content/media/webrtc/LoadManager.h
@@ -42,7 +42,6 @@ private:
     void LoadHasChanged();
 
     nsRefPtr<LoadMonitor> mLoadMonitor;
-    float mLastSystemLoad;
     float mLoadSum;
     int   mLoadSumMeasurements;
     // Set when overuse was signaled to us, and hasn't been un-signaled yet.
diff --git a/content/media/webrtc/LoadMonitor.h b/content/media/webrtc/LoadMonitor.h
index 4260854ee13..6576b4d8f41 100644
--- a/content/media/webrtc/LoadMonitor.h
+++ b/content/media/webrtc/LoadMonitor.h
@@ -53,7 +53,6 @@ private:
     mozilla::CondVar     mCondVar;
     bool                 mShutdownPending;
     nsCOMPtr<nsIThread>  mLoadInfoThread;
-    uint64_t             mTicksPerInterval;
     float                mSystemLoad;
     float                mProcessLoad;
     LoadNotificationCallback* mLoadNotificationCallback;