diff --git a/gfx/layers/ipc/CompositorParent.cpp b/gfx/layers/ipc/CompositorParent.cpp
index e1fbb0277596..108b0493f49a 100644
--- a/gfx/layers/ipc/CompositorParent.cpp
+++ b/gfx/layers/ipc/CompositorParent.cpp
@@ -185,7 +185,7 @@ CompositorParent::Composite()
 
   mLastCompose = mozilla::TimeStamp::Now();
 
-  if (mPaused || !mLayerManager) {
+  if (mPaused || !mLayerManager || !mLayerManager->GetRoot()) {
     return;
   }