diff --git a/src/Libraries/Web/Xml/XmlDocument.cs b/src/Libraries/Web/Xml/XmlDocument.cs
index d196825f3..2629072e9 100644
--- a/src/Libraries/Web/Xml/XmlDocument.cs
+++ b/src/Libraries/Web/Xml/XmlDocument.cs
@@ -59,5 +59,9 @@ public XmlNode CreateProcessingInstruction(string target, string data) {
         public XmlText CreateTextNode(string text) {
             return null;
         }
+
+        public XmlNode ImportNode(XmlNode externalNode, bool deep) {
+            return null;
+        }
     }
 }