diff --git a/libguile/continuations.h b/libguile/continuations.h
index ac636512e..71ecf7305 100644
--- a/libguile/continuations.h
+++ b/libguile/continuations.h
@@ -22,7 +22,7 @@
 
 
 
-#ifndef _WIN64
+#ifndef _WIN32
 #include <setjmp.h>
 #else
 #include "libguile/setjump-win.h"
diff --git a/libguile/dynstack.c b/libguile/dynstack.c
index e4ed878c2..801a27f50 100644
--- a/libguile/dynstack.c
+++ b/libguile/dynstack.c
@@ -26,7 +26,7 @@
 
 #include <assert.h>
 
-#ifndef _WIN64
+#ifndef _WIN32
 #include <setjmp.h>
 #else
 #include "setjump-win.h"
diff --git a/libguile/dynstack.h b/libguile/dynstack.h
index 6f0775e40..1027c1ac6 100644
--- a/libguile/dynstack.h
+++ b/libguile/dynstack.h
@@ -22,7 +22,7 @@
 
 
 
-#ifndef _WIN64
+#ifndef _WIN32
 #include <setjmp.h>
 #else
 #include "libguile/setjump-win.h"
diff --git a/libguile/vm.h b/libguile/vm.h
index d5b7138d3..f43f87fe5 100644
--- a/libguile/vm.h
+++ b/libguile/vm.h
@@ -20,7 +20,7 @@
 #ifndef _SCM_VM_H_
 #define _SCM_VM_H_
 
-#ifndef _WIN64
+#ifndef _WIN32
 #include <setjmp.h>
 #else
 #include "libguile/setjump-win.h"