diff --git a/layout/base/nsCSSFrameConstructor.cpp b/layout/base/nsCSSFrameConstructor.cpp
index 0fc1f6ac9f44..83ac10fe9233 100644
--- a/layout/base/nsCSSFrameConstructor.cpp
+++ b/layout/base/nsCSSFrameConstructor.cpp
@@ -1573,7 +1573,7 @@ struct nsGenConInitializer {
 already_AddRefed<nsIContent>
 nsCSSFrameConstructor::CreateGenConTextNode(nsFrameConstructorState& aState,
                                             const nsString& aString,
-                                            nsCOMPtr<nsIDOMCharacterData>* aText,
+                                            nsRefPtr<nsTextNode>* aText,
                                             nsGenConInitializer* aInitializer)
 {
   nsRefPtr<nsTextNode> content = new nsTextNode(mDocument->NodeInfoManager());
diff --git a/layout/base/nsCSSFrameConstructor.h b/layout/base/nsCSSFrameConstructor.h
index edb6ffe0e7f5..cd0bb7c26ec2 100644
--- a/layout/base/nsCSSFrameConstructor.h
+++ b/layout/base/nsCSSFrameConstructor.h
@@ -337,7 +337,7 @@ private:
    */
   already_AddRefed<nsIContent> CreateGenConTextNode(nsFrameConstructorState& aState,
                                                     const nsString& aString,
-                                                    nsCOMPtr<nsIDOMCharacterData>* aText,
+                                                    nsRefPtr<nsTextNode>* aText,
                                                     nsGenConInitializer* aInitializer);
 
   /**
diff --git a/layout/base/nsGenConList.h b/layout/base/nsGenConList.h
index 87ccf01185a3..d59e84e64621 100644
--- a/layout/base/nsGenConList.h
+++ b/layout/base/nsGenConList.h
@@ -11,8 +11,8 @@
 #include "nsIFrame.h"
 #include "nsStyleStruct.h"
 #include "prclist.h"
-#include "nsIDOMCharacterData.h"
 #include "nsCSSPseudoElements.h"
+#include "nsTextNode.h"
 
 class nsGenConList;
 
@@ -30,7 +30,7 @@ struct nsGenConNode : public PRCList {
 
   // null for 'content:no-open-quote', 'content:no-close-quote' and for
   // counter nodes for increments and resets (rather than uses)
-  nsCOMPtr<nsIDOMCharacterData> mText;
+  nsRefPtr<nsTextNode> mText;
 
   nsGenConNode(int32_t aContentIndex)
     : mPseudoFrame(nullptr)