diff --git a/builds/msvc/errno.cpp b/builds/msvc/errno.cpp
index bf386371..ddfe59ff 100644
--- a/builds/msvc/errno.cpp
+++ b/builds/msvc/errno.cpp
@@ -1,4 +1,4 @@
-#if defined WINCE
+#if defined _WIN32_WCE
 
 //#include "..\..\include\zmq.h"
 #include "..\..\src\err.hpp"
diff --git a/include/zmq.h b/include/zmq.h
index b9f194ea..9f7093f2 100644
--- a/include/zmq.h
+++ b/include/zmq.h
@@ -27,7 +27,7 @@
 extern "C" {
 #endif
 
-#if !defined WINCE
+#if !defined _WIN32_WCE
 #include <errno.h>
 #endif
 #include <stddef.h>
diff --git a/src/clock.cpp b/src/clock.cpp
index 1646397c..3ef01021 100644
--- a/src/clock.cpp
+++ b/src/clock.cpp
@@ -27,7 +27,7 @@
 #include <stddef.h>
 
 #if defined _MSC_VER
-#if defined WINCE
+#if defined _WIN32_WCE
 #include <cmnintrin.h>
 #else
 #include <intrin.h>
diff --git a/src/err.cpp b/src/err.cpp
index 5aecd544..23662884 100644
--- a/src/err.cpp
+++ b/src/err.cpp
@@ -203,7 +203,7 @@ const char *zmq::wsa_error_no (int no_)
 void zmq::win_error (char *buffer_, size_t buffer_size_)
 {
     DWORD errcode = GetLastError ();
-#if defined WINCE
+#if defined _WIN32_WCE
     DWORD rc = FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM |
         FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errcode, MAKELANGID(LANG_NEUTRAL,
         SUBLANG_DEFAULT), (LPWSTR)buffer_, buffer_size_ / sizeof(wchar_t), NULL );
diff --git a/src/err.hpp b/src/err.hpp
index 7e27c823..81c95410 100644
--- a/src/err.hpp
+++ b/src/err.hpp
@@ -26,7 +26,7 @@
 #include "../include/zmq.h"
 
 #include <assert.h>
-#if defined WINCE
+#if defined _WIN32_WCE
 #include "..\builds\msvc\errno.hpp"
 #else
 #include <errno.h>
diff --git a/src/socket_base.cpp b/src/socket_base.cpp
index bfcdd383..3317ad12 100644
--- a/src/socket_base.cpp
+++ b/src/socket_base.cpp
@@ -29,7 +29,7 @@
 #if defined ZMQ_HAVE_WINDOWS
 #include "windows.hpp"
 #if defined _MSC_VER
-#if defined WINCE
+#if defined _WIN32_WCE
 #include <cmnintrin.h>
 #else
 #include <intrin.h>
diff --git a/src/thread.cpp b/src/thread.cpp
index cc1964a4..8fe9016f 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -43,7 +43,7 @@ void zmq::thread_t::start (thread_fn *tfn_, void *arg_)
 {
     tfn = tfn_;
     arg =arg_;
-#if defined WINCE
+#if defined _WIN32_WCE
     descriptor = (HANDLE) CreateThread (NULL, 0,
         &::thread_routine, this, 0 , NULL);
 #else
diff --git a/src/windows.hpp b/src/windows.hpp
index 4a3124eb..d89a9a84 100644
--- a/src/windows.hpp
+++ b/src/windows.hpp
@@ -170,7 +170,7 @@
 
 #include <ws2tcpip.h>
 #include <ipexport.h>
-#if !defined WINCE
+#if !defined _WIN32_WCE
 #include <process.h>
 #endif