--- a/mercurial/parsers.c	Mon Sep 08 20:06:52 2014 +0200
+++ b/mercurial/parsers.c	Thu Sep 11 12:05:23 2014 -0500
@@ -881,7 +881,7 @@
 
 		if (nothead[i])
 			continue;
-		head = PyInt_FromLong(i);
+		head = PyInt_FromSsize_t(i);
 		if (head == NULL || PyList_Append(heads, head) == -1) {
 			Py_XDECREF(head);
 			goto bail;