diff --git a/layout/base/FrameLayerBuilder.cpp b/layout/base/FrameLayerBuilder.cpp
index 21b02b7d65d..e0c42b515c7 100644
--- a/layout/base/FrameLayerBuilder.cpp
+++ b/layout/base/FrameLayerBuilder.cpp
@@ -2630,6 +2630,10 @@ FrameLayerBuilder::DrawThebesLayer(ThebesLayer* aLayer,
     // so 'entry' could become invalid.
   }
 
+  if (!containerLayerFrame) {
+    return;
+  }
+
   ThebesDisplayItemLayerUserData* userData =
     static_cast<ThebesDisplayItemLayerUserData*>
       (aLayer->GetUserData(&gThebesDisplayItemLayerUserData));