diff --git a/stepmania/src/XmlFile.h b/stepmania/src/XmlFile.h
index ecfcfd4540..50d9ea418b 100644
--- a/stepmania/src/XmlFile.h
+++ b/stepmania/src/XmlFile.h
@@ -104,6 +104,9 @@ public:
 	~XNode();
 
 	void Clear();
+
+private:
+	XNode &operator=( const XNode &cpy ) { } // don't use
 };
 
 #endif