--- a/mercurial/parsers.c	Thu Apr 18 19:50:04 2013 +0900
+++ b/mercurial/parsers.c	Thu Apr 18 20:28:38 2013 +0200
@@ -1285,7 +1285,7 @@
 	if (revcount > capacity) {
 		PyErr_Format(PyExc_OverflowError,
 			     "bitset size (%ld) > capacity (%ld)",
-			     revcount, capacity);
+			     (long)revcount, (long)capacity);
 		return NULL;
 	}