diff --git a/modules/core/include/visp3/core/vpSerial.h b/modules/core/include/visp3/core/vpSerial.h
index c961e49ca5..af5e2bd4fe 100644
--- a/modules/core/include/visp3/core/vpSerial.h
+++ b/modules/core/include/visp3/core/vpSerial.h
@@ -54,7 +54,7 @@ BEGIN_VISP_NAMESPACE
 
 int main()
 {
-#ifndef WIN32
+#ifndef _WIN32
   vpSerial serial("/dev/ttyUSB0");
   serial.write("Hello world");
 #endif
diff --git a/modules/core/src/tools/serial/vpSerial.cpp b/modules/core/src/tools/serial/vpSerial.cpp
index dc67b13159..1c4e2461f1 100644
--- a/modules/core/src/tools/serial/vpSerial.cpp
+++ b/modules/core/src/tools/serial/vpSerial.cpp
@@ -67,7 +67,7 @@ BEGIN_VISP_NAMESPACE
 
 int main()
 {
-#ifndef WIN32
+#ifndef _WIN32
   vpSerial serial("/dev/ttyUSB0");
 #endif
 }
@@ -79,7 +79,7 @@ int main()
 
 int main()
 {
-#ifndef WIN32
+#ifndef _WIN32
   vpSerial serial;
   serial.setPort("/dev/ttyUSB0");
   serial.open();
@@ -146,7 +146,7 @@ void vpSerial::setStopbits(const stopbits_t &stopbits) { m_stopbits = stopbits;
 
 int main()
 {
-#ifndef WIN32
+#ifndef _WIN32
   vpSerial serial;
   serial.setPort("/dev/ttyUSB0");
   serial.open();
@@ -207,7 +207,7 @@ void vpSerial::close()
 
 int main()
 {
-#ifndef WIN32
+#ifndef _WIN32
   vpSerial serial;
 
   serial.setPort("/dev/ttyUSB0");
diff --git a/modules/robot/src/real-robot/flir-ptu/vpRobotFlirPtu.cpp b/modules/robot/src/real-robot/flir-ptu/vpRobotFlirPtu.cpp
index ce4e9a98e1..27b57c2a03 100644
--- a/modules/robot/src/real-robot/flir-ptu/vpRobotFlirPtu.cpp
+++ b/modules/robot/src/real-robot/flir-ptu/vpRobotFlirPtu.cpp
@@ -71,7 +71,7 @@ void vpRobotFlirPtu::emergencyStop(int signo)
   case SIGSEGV:
     msg << "SIGSEGV (stop due to a segmentation fault) ";
     break;
-#ifndef WIN32
+#ifndef _WIN32
   case SIGBUS:
     msg << "SIGBUS (stop due to a bus error) ";
     break;
@@ -113,7 +113,7 @@ vpRobotFlirPtu::vpRobotFlirPtu()
 {
   signal(SIGINT, vpRobotFlirPtu::emergencyStop);
   signal(SIGSEGV, vpRobotFlirPtu::emergencyStop);
-#ifndef WIN32
+#ifndef _WIN32
   signal(SIGBUS, vpRobotFlirPtu::emergencyStop);
   signal(SIGKILL, vpRobotFlirPtu::emergencyStop);
   signal(SIGQUIT, vpRobotFlirPtu::emergencyStop);
@@ -547,7 +547,7 @@ void vpRobotFlirPtu::connect(const std::string &portname, int baudrate)
 
   // Open a port
   if (ceropen(m_cer, portname.c_str(), 0)) {
-#if WIN32
+#if _WIN32
     throw(vpException(vpException::fatalError, "Failed to open %s: %s.", portname.c_str(),
                       cerstrerror(m_cer, errstr, sizeof(errstr))));
 #else