diff --git a/meson.build b/meson.build
index 9f7db50225f..ce2ec7a79c8 100644
--- a/meson.build
+++ b/meson.build
@@ -1617,6 +1617,10 @@ elif host_machine.system() != 'windows'
 else
   dep_expat = null_dep
 endif
+# Predefined macros for windows
+if host_machine.system() == 'windows'
+  pre_args += '-DWIN32_LEAN_AND_MEAN' # http://msdn2.microsoft.com/en-us/library/6dwk3a1z.aspx
+endif
 # this only exists on linux so either this is linux and it will be found, or
 # it's not linux and wont
 dep_m = cc.find_library('m', required : false)
diff --git a/src/c11/impl/threads_win32.c b/src/c11/impl/threads_win32.c
index e8f79b4e12c..eb818d96967 100644
--- a/src/c11/impl/threads_win32.c
+++ b/src/c11/impl/threads_win32.c
@@ -37,9 +37,6 @@
 
 #include "threads_win32.h"
 
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN 1
-#endif
 #include <windows.h>
 
 /*
diff --git a/src/c11/impl/time.c b/src/c11/impl/time.c
index ae82940d8f0..ebbb5ceac2d 100644
--- a/src/c11/impl/time.c
+++ b/src/c11/impl/time.c
@@ -34,9 +34,6 @@
 
 #if defined(_WIN32) && !defined(__CYGWIN__)
 
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN 1
-#endif
 #include <windows.h>
 
 int
diff --git a/src/gallium/auxiliary/rtasm/rtasm_execmem.c b/src/gallium/auxiliary/rtasm/rtasm_execmem.c
index 58b1db32379..7fd834eb708 100644
--- a/src/gallium/auxiliary/rtasm/rtasm_execmem.c
+++ b/src/gallium/auxiliary/rtasm/rtasm_execmem.c
@@ -43,9 +43,6 @@
 #endif
 
 #if defined(PIPE_OS_WINDOWS)
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN 1
-#endif
 #include <windows.h>
 #endif
 
diff --git a/src/gallium/frontends/osmesa/meson.build b/src/gallium/frontends/osmesa/meson.build
index fe78a4daa31..8abf55c02e4 100644
--- a/src/gallium/frontends/osmesa/meson.build
+++ b/src/gallium/frontends/osmesa/meson.build
@@ -20,7 +20,6 @@
 
 osmesa_st_c_args = []
 if with_platform_windows
-  osmesa_st_c_args += ['-DWIN32_LEAN_AND_MEAN']
   if not with_shared_glapi
     osmesa_st_c_args += ['-D_GLAPI_NO_EXPORTS']
   endif
diff --git a/src/gallium/frontends/wgl/meson.build b/src/gallium/frontends/wgl/meson.build
index 340e9cf0dd9..40a93ad363a 100644
--- a/src/gallium/frontends/wgl/meson.build
+++ b/src/gallium/frontends/wgl/meson.build
@@ -47,7 +47,6 @@ libwgl = static_library(
   ),
   c_args : [
     '-D_GDI32_',             # prevent wgl* being declared __declspec(dllimport)
-    '-DWIN32_LEAN_AND_MEAN', # http://msdn2.microsoft.com/en-us/library/6dwk3a1z.aspx
     _c_args_wgl
   ],
   include_directories : [
diff --git a/src/gallium/targets/libgl-gdi/tests/wgl_tests.cpp b/src/gallium/targets/libgl-gdi/tests/wgl_tests.cpp
index f6d56ba3fe7..514507d13f4 100644
--- a/src/gallium/targets/libgl-gdi/tests/wgl_tests.cpp
+++ b/src/gallium/targets/libgl-gdi/tests/wgl_tests.cpp
@@ -24,6 +24,7 @@
 #include <gtest/gtest.h>
 
 #include <windows.h>
+#include <unknwn.h>
 #include <GL/gl.h>
 
 #undef GetMessage
diff --git a/src/microsoft/compiler/dxil_validator.cpp b/src/microsoft/compiler/dxil_validator.cpp
index 85a0621dcc8..cda43ca7939 100644
--- a/src/microsoft/compiler/dxil_validator.cpp
+++ b/src/microsoft/compiler/dxil_validator.cpp
@@ -1,9 +1,5 @@
 #include "dxil_validator.h"
 
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN 1
-#endif
-
 #include <windows.h>
 #include <unknwn.h>
 
diff --git a/src/util/memstream.h b/src/util/memstream.h
index 0bed1132559..2d4be8257c1 100644
--- a/src/util/memstream.h
+++ b/src/util/memstream.h
@@ -31,9 +31,6 @@
 #include <stdbool.h>
 #include <stdio.h>
 #ifdef _WIN32
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN 1
-#endif
 #include <windows.h>
 #endif
 
diff --git a/src/util/os_misc.c b/src/util/os_misc.c
index 90c51408fe6..61e9746c8ff 100644
--- a/src/util/os_misc.c
+++ b/src/util/os_misc.c
@@ -35,9 +35,6 @@
 
 #if DETECT_OS_WINDOWS
 
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN      // Exclude rarely-used stuff from Windows headers
-#endif
 #include <windows.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/util/u_thread.h b/src/util/u_thread.h
index ec30eb4f478..38f6808f3a0 100644
--- a/src/util/u_thread.h
+++ b/src/util/u_thread.h
@@ -50,9 +50,6 @@
 #if DETECT_OS_LINUX && !defined(ANDROID)
 #include <sched.h>
 #elif defined(_WIN32) && !defined(__CYGWIN__) && _WIN32_WINNT >= 0x0600
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN 1
-#endif
 #include <windows.h>
 #endif