diff --git a/src/mathed/ChangeLog b/src/mathed/ChangeLog
index 6b7aa193b8..31506aa8f8 100644
--- a/src/mathed/ChangeLog
+++ b/src/mathed/ChangeLog
@@ -1,3 +1,7 @@
+2004-05-17  José Matos  <jamatos@lyx.org>
+
+	* math_hullinset.C (docbook): add support for label.
+
 2004-04-29  Angus Leeming  <leeming@lyx.org>
 
 	* math_hullinset.C:
diff --git a/src/mathed/math_hullinset.C b/src/mathed/math_hullinset.C
index 7c5327650e..a39330fca1 100644
--- a/src/mathed/math_hullinset.C
+++ b/src/mathed/math_hullinset.C
@@ -1241,7 +1241,9 @@ int MathHullInset::docbook(Buffer const & buf, ostream & os,
 			  OutputParams const & runparams) const
 {
 	MathMLStream ms(os);
-	ms << MTag("equation");
+	string name="equation";
+	if (! label(0).empty()) name += " id=\"" + label(0)+ "\"";
+	ms << MTag(name.c_str());
 	ms <<   MTag("alt");
 	ms <<    "<[CDATA[";
 	int res = plaintext(buf, ms.os(), runparams);