diff --git a/Ooui/Element.cs b/Ooui/Element.cs
index ea203b1..cbd1430 100644
--- a/Ooui/Element.cs
+++ b/Ooui/Element.cs
@@ -232,6 +232,8 @@ namespace Ooui
 
         protected virtual bool HtmlNeedsFullEndElement => false;
 
+#if !NO_XML
+
         public override void WriteOuterHtml (System.Xml.XmlWriter w)
         {
             w.WriteStartElement (TagName);
@@ -262,5 +264,7 @@ namespace Ooui
                 c.WriteOuterHtml (w);
             }
         }
+
+#endif
     }
 }
diff --git a/Ooui/Node.cs b/Ooui/Node.cs
index c7456f6..4d9ad8c 100644
--- a/Ooui/Node.cs
+++ b/Ooui/Node.cs
@@ -188,6 +188,8 @@ namespace Ooui
             return false;
         }
 
+#if !NO_XML
+
         public virtual string OuterHtml {
             get {
                 using (var stream = new System.IO.MemoryStream ()) {
@@ -206,6 +208,8 @@ namespace Ooui
         }
 
         public abstract void WriteOuterHtml (System.Xml.XmlWriter w);
+
+#endif
     }
 
     class ReadOnlyList<T> : IReadOnlyList<T>
diff --git a/Ooui/TextArea.cs b/Ooui/TextArea.cs
index f3f2d5f..e6864b2 100644
--- a/Ooui/TextArea.cs
+++ b/Ooui/TextArea.cs
@@ -55,9 +55,13 @@ namespace Ooui
             return base.TriggerEventFromMessage (message);
         }
 
+#if !NO_XML
+
         public override void WriteInnerHtml (System.Xml.XmlWriter w)
         {
             w.WriteString (val ?? "");
         }
+
+#endif
     }
 }
diff --git a/Ooui/TextNode.cs b/Ooui/TextNode.cs
index 8fccf8c..b94625c 100644
--- a/Ooui/TextNode.cs
+++ b/Ooui/TextNode.cs
@@ -21,9 +21,13 @@ namespace Ooui
             Text = text;
         }
 
+#if !NO_XML
+
         public override void WriteOuterHtml (System.Xml.XmlWriter w)
         {
             w.WriteString (text);
         }
+
+#endif
     }
 }