--- a/gfx/layers/PaintThread.cpp
+++ b/gfx/layers/PaintThread.cpp
@@ -169,21 +169,20 @@ PaintThread::PaintContents(CapturedPaint
   // owns the underlying MessageChannel. Otherwise we leave it null and use
   // synchronous dispatch.
   RefPtr<CompositorBridgeChild> cbc;
   if (!gfxPrefs::LayersOMTPForceSync()) {
     cbc = CompositorBridgeChild::Get();
     cbc->NotifyBeginAsyncPaint(aState);
   }
   RefPtr<CapturedPaintState> state(aState);
-  RefPtr<DrawTargetCapture> capture(aState->mCapture);
 
   RefPtr<PaintThread> self = this;
   RefPtr<Runnable> task = NS_NewRunnableFunction("PaintThread::PaintContents",
-    [self, cbc, capture, state, aCallback]() -> void
+    [self, cbc, state, aCallback]() -> void
   {
     self->AsyncPaintContents(cbc,
                              state,
                              aCallback);
   });
 
   if (cbc) {
     sThread->Dispatch(task.forget());