--- src/kernel/ring/modular-log16.h.orig	2017-06-02 05:16:43.000000000 -0600
+++ src/kernel/ring/modular-log16.h	2017-11-21 20:17:59.159583284 -0700
@@ -24,6 +24,7 @@
 #include "givaro/givarray0.h"
 #include "givaro/givranditer.h"
 #include "givaro/modular-general.h"
+#undef iszero
 
 namespace Givaro
 {
--- src/library/vector/givvectorsparse.h.orig	2017-06-02 05:16:43.000000000 -0600
+++ src/library/vector/givvectorsparse.h	2017-11-21 20:22:51.040533301 -0700
@@ -22,6 +22,7 @@
 #include "givaro/givvector.h"
 #include "givaro/givstoragesparse.h"
 #include "givaro/givelem.h"
+#undef iszero
 namespace Givaro {
 #pragma message "#warning this file will probably not compile"