diff --git a/mingw-w64-qt5-doc/0064-fix-mingw-win32-winnt-detection.patch b/mingw-w64-qt5-doc/0064-fix-mingw-win32-winnt-detection.patch
new file mode 100644
index 0000000000..26b8e62ff0
--- /dev/null
+++ b/mingw-w64-qt5-doc/0064-fix-mingw-win32-winnt-detection.patch
@@ -0,0 +1,26 @@
+--- a/qtbase/src/corelib/global/qt_windows.h
++++ b/qtbase/src/corelib/global/qt_windows.h
+@@ -45,6 +45,11 @@
+ #pragma qt_sync_stop_processing
+ #endif
+ 
++#ifndef NOMINMAX
++#  define NOMINMAX
++#endif
++#include <windows.h>
++
+ #if defined(Q_CC_MINGW)
+ // mingw's windows.h does not set _WIN32_WINNT, resulting breaking compilation
+ #  ifndef WINVER
+@@ -58,11 +63,6 @@
+ #  endif
+ #endif
+ 
+-#ifndef NOMINMAX
+-#  define NOMINMAX
+-#endif
+-#include <windows.h>
+-
+ #if defined(_WIN32_IE) && _WIN32_IE < 0x0501
+ #  undef _WIN32_IE
+ #endif
diff --git a/mingw-w64-qt5-doc/PKGBUILD b/mingw-w64-qt5-doc/PKGBUILD
index 62d711f930..79379b0b10 100644
--- a/mingw-w64-qt5-doc/PKGBUILD
+++ b/mingw-w64-qt5-doc/PKGBUILD
@@ -76,6 +76,7 @@ source=(https://download.qt.io/official_releases/qt/${pkgver%.*}/${pkgver}/singl
         0060-activeqt-handle-win64-in-dumpcpp.patch
         0062-fix-static-build-big-resources.patch
         0063-enable-mingw-schannel-alpn.patch
+        0064-fix-mingw-win32-winnt-detection.patch
         0125-qt5-windeployqt-fixes.patch
         0300-qt-5.8.0-cast-errors.patch
         0302-ugly-hack-disable-qdoc-build.patch
@@ -144,6 +145,7 @@ prepare() {
     0060-activeqt-handle-win64-in-dumpcpp.patch \
     0062-fix-static-build-big-resources.patch \
     0063-enable-mingw-schannel-alpn.patch \
+    0064-fix-mingw-win32-winnt-detection.patch \
     0125-qt5-windeployqt-fixes.patch \
     0300-qt-5.8.0-cast-errors.patch \
     0304-qtdeclarative-disable-dx12.patch \
@@ -295,6 +297,7 @@ sha256sums=('b7412734698a87f4a0ae20751bab32b1b07fdc351476ad8e35328dbe10efdedb'
             '928a8eaca8840ff353cdff8fd11140724cb89094e6115fdd7b8cf534830adcca'
             'f07ff4f72626b91aa67ce7ffc78ce7c7c5765bf5431a65b7d867b5f66fa1506b'
             'f930338562119f542b550e3cdb802f1f7ebd476f54dd7297db424271167394b0'
+            '6fc871c9a3697666c19d5c21a8f038b80c9c825b418435b0723bf35a9e532d91'
             '28ad823dc8b6665de7b552e82411a8b7b25bf716c42597d8dc8644bded63199c'
             '9ea7aeb486023f3aebf1af44603ebd9266009aaeaf91e52c37c8c5154ea3900c'
             '7e57ce20b6707bc3b4a727da3287cadda13a74317d86515358b2535bc15244c7'