--- Singular-Release-4-2-1p3/kernel/groebner_walk/walkSupport.cc.orig	2021-12-17 11:35:18.000000000 -0700
+++ Singular-Release-4-2-1p3/kernel/groebner_walk/walkSupport.cc	2022-07-25 13:16:57.297425786 -0600
@@ -12,7 +12,7 @@
 #include "kernel/groebner_walk/walkSupport.h"
 #include "kernel/GBEngine/kstd1.h"
 
-EXTERN_VAR BOOLEAN overflow_error;
+EXTERN_VAR int overflow_error;
 
 ///////////////////////////////////////////////////////////////////
 //Support functions for Groebner Walk and Fractal Walk