diff --git a/layout/forms/nsTextControlFrame.cpp b/layout/forms/nsTextControlFrame.cpp
index ba0060b2d6ca..1e748b1751ac 100644
--- a/layout/forms/nsTextControlFrame.cpp
+++ b/layout/forms/nsTextControlFrame.cpp
@@ -451,6 +451,7 @@ nsTextControlFrame::CreateRootNode()
   MOZ_ASSERT(!mRootNode);
 
   mRootNode = CreateEmptyDiv(*this);
+  mRootNode->SetIsNativeAnonymousRoot();
 
   mMutationObserver = new nsAnonDivObserver(*this);
   mRootNode->AddMutationObserver(mMutationObserver);