diff -r cde6904f1992 -r 42342f9afe01 mercurial/parsers.c
--- a/mercurial/parsers.c	Sat Oct 25 21:34:49 2014 -0400
+++ b/mercurial/parsers.c	Sun Oct 26 12:14:10 2014 +0100
@@ -2109,7 +2109,9 @@
 	{"get", (PyCFunction)index_m_get, METH_VARARGS,
 	 "get an index entry"},
 	{"headrevs", (PyCFunction)index_headrevs, METH_VARARGS,
-	 "get head revisions"},
+	 "get head revisions"}, /* Can do filtering since 3.2 */
+	{"headrevsfiltered", (PyCFunction)index_headrevs, METH_VARARGS,
+	 "get filtered head revisions"}, /* Can always do filtering */
 	{"insert", (PyCFunction)index_insert, METH_VARARGS,
 	 "insert an index entry"},
 	{"partialmatch", (PyCFunction)index_partialmatch, METH_VARARGS,