diff --git a/src/main/java/org/apache/xmlbeans/impl/store/CommentXobj.java b/src/main/java/org/apache/xmlbeans/impl/store/CommentXobj.java
index 332b6b027..3e0c3d768 100644
--- a/src/main/java/org/apache/xmlbeans/impl/store/CommentXobj.java
+++ b/src/main/java/org/apache/xmlbeans/impl/store/CommentXobj.java
@@ -54,6 +54,14 @@ public Node getFirstChild() {
         return null;
     }
 
+    public Node getLastChild() {
+        return null;
+    }
+
+    public boolean hasChildNodes() {
+        return false;
+    }
+
     public void insertData(int offset, String arg) {
         DomImpl._characterData_insertData(this, offset, arg);
     }