--- libsrc/eclib/points.h.orig	2016-07-20 05:33:48.000000000 -0600
+++ libsrc/eclib/points.h	2016-10-20 14:34:29.093289919 -0600
@@ -29,6 +29,8 @@
 
 #include "curve.h"
 
+#undef iszero
+
 //
 // class for  points on elliptic curves
 //