diff --git a/build.sh b/build.sh
index 135796b53d941df00b4cdaa2974a558378e606f2..349a54a5771de4634fab1f5e9eb1d0bb177c7378 100755
--- a/build.sh
+++ b/build.sh
@@ -740,6 +740,7 @@ build_mac()
 
 build_win32()
 {
+    export CPPFLAGS="-D_WIN32_WINDOWS=0x0410 $CPPFLAGS"
     export CFLAGS="-mms-bitfields $CFLAGS"
     export CXXFLAGS="-mms-bitfields $CXXFLAGS"