diff --git a/src/include/xml.h b/src/include/xml.h
index 15300ac64..fbadfbb8a 100755
--- a/src/include/xml.h
+++ b/src/include/xml.h
@@ -57,6 +57,7 @@ public:
   bool GetEnclosedReal(const char* strAttr, real & r) const;
 
   TXmlItem& SetAttr(const char* strAttr, const char* strVal);
+  void ListAttrs(TString_array & attrs) const { attrs.destroy(); if (m_Attributes) m_Attributes->get_keys(attrs); }
 	const TString& GetAttr(const char* strAttr) const;
   TXmlItem& SetAttr(const char* strAttr, int n);
   TXmlItem& SetColorAttr(const char* strAttr, COLOR rgb);