diff --git a/include/libxml/parser.h b/include/libxml/parser.h
index a8f0637..da404e7 100644
--- a/include/libxml/parser.h
+++ b/include/libxml/parser.h
@@ -111,6 +111,23 @@
 } xmlParserInputState;
 
 /**
+ * XML_DETECT_IDS:
+ *
+ * Bit in the loadsubset context field to tell to do ID/REFs lookups
+ * Use it to initialize xmlLoadExtDtdDefaultValue
+ */
+#define XML_DETECT_IDS		2
+
+/**
+ * XML_COMPLETE_ATTRS:
+ *
+ * Bit in the loadsubset context field to tell to do complete the
+ * elements attributes lists with the ones defaulted from the DTDs
+ * Use it to initialize xmlLoadExtDtdDefaultValue
+ */
+#define XML_COMPLETE_ATTRS	4
+
+/**
  * xmlParserCtxt:
  *
  * The parser context.