diff --git a/libs/qt5/qtwebengine/0001-Fix-building-GN-with-VS-2019.patch b/libs/qt5/qtwebengine/0001-Fix-building-GN-with-VS-2019.patch
new file mode 100644
index 00000000..c8ee8a54
--- /dev/null
+++ b/libs/qt5/qtwebengine/0001-Fix-building-GN-with-VS-2019.patch
@@ -0,0 +1,30 @@
+From 4c061bfd83c823eaae0e6bd6a9004e6b2909564b Mon Sep 17 00:00:00 2001
+From: Allan Sandfeld Jensen <allan.jensen@qt.io>
+Date: Wed, 17 Apr 2019 16:25:29 +0200
+Subject: [PATCH] Fix building GN with VS 2019
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Task-number: QTBUG-75212
+Change-Id: I04ecfbcd2bd947d5f497dbd406e5e6e70b849802
+Reviewed-by: Jüri Valdmann <juri.valdmann@qt.io>
+---
+ gn/tools/gn/substitution_writer.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/3rdparty/gn/tools/gn/substitution_writer.h b/src/3rdparty/gn/tools/gn/substitution_writer.h
+index d5cb1c31bd..530f064769 100644
+--- a/src/3rdparty/gn/tools/gn/substitution_writer.h
++++ b/src/3rdparty/gn/tools/gn/substitution_writer.h
+@@ -6,6 +6,7 @@
+ #define TOOLS_GN_SUBSTITUTION_WRITER_H_
+ 
+ #include <iosfwd>
++#include <string>
+ #include <vector>
+ 
+ #include "tools/gn/substitution_type.h"
+-- 
+2.17.1
+
diff --git a/libs/qt5/qtwebengine/qtwebengine.py b/libs/qt5/qtwebengine/qtwebengine.py
index fa7ba551..85ddd5df 100644
--- a/libs/qt5/qtwebengine/qtwebengine.py
+++ b/libs/qt5/qtwebengine/qtwebengine.py
@@ -1,82 +1,84 @@
 # -*- coding: utf-8 -*-
 import info
 
 
 class subinfo(info.infoclass):
     def registerOptions(self):
         # only supports msvc17+
         if CraftCore.compiler.isMSVC() and CraftCore.compiler.getInternalVersion() < 15:
             self.parent.package.categoryInfo.compiler = CraftCore.compiler.Compiler.NoCompiler
 
     def setTargets(self):
         self.versionInfo.setDefaultValues()
         self.patchLevel["5.12.1"] = 2
 
+        self.patchToApply["5.12.3"] = [("0001-Fix-building-GN-with-VS-2019.patch", 1)]
+
         for ver in self.versionInfo.tarballs() + self.versionInfo.branches() + self.versionInfo.tags():
             qtVer = CraftVersion(ver)
             if qtVer <= CraftVersion("5.9"):
                 self.patchToApply[ver] = [("0001-Fix-the-detection-of-python2.exe.patch", 1)]#https://codereview.qt-project.org/#/c/203000/
 
     def setDependencies(self):
         self.buildDependencies["dev-utils/gperf"] = None
         self.buildDependencies["dev-utils/flexbison"] = None
         self.buildDependencies["dev-utils/python2"] = None
         self.runtimeDependencies["libs/qt5/qtbase"] = None
         self.runtimeDependencies["libs/qt5/qtlocation"] = None
         self.runtimeDependencies["libs/qt5/qtdeclarative"] = None
         self.runtimeDependencies["libs/qt5/qtwebchannel"] = None
         if not CraftCore.compiler.isWindows:
             self.runtimeDependencies["libs/lcms2"] = None
             self.runtimeDependencies["libs/freetype"] = None
             self.runtimeDependencies["libs/libopus"] = None
             self.runtimeDependencies["libs/zlib"] = None
             self.runtimeDependencies["libs/libxml2"] = None
             self.runtimeDependencies["libs/libxslt"] = None
             self.runtimeDependencies["libs/freetype"] = None
             self.runtimeDependencies["libs/fontconfig"] = None
             self.runtimeDependencies["libs/libjpeg-turbo"] = None
             self.runtimeDependencies["qt-libs/poppler"] = None
             self.runtimeDependencies["libs/webp"] = None
             self.runtimeDependencies["libs/ffmpeg"] = None
 
 
 from Package.Qt5CorePackageBase import *
 
 
 class QtPackage(Qt5CorePackageBase):
     def __init__(self, **args):
         Qt5CorePackageBase.__init__(self)
         self.subinfo.options.fetch.checkoutSubmodules = True
         if CraftCore.compiler.isLinux:
             self.subinfo.options.configure.args += " -- --webengine-pulseaudio=no --webengine-ffmpeg=system"
 
     def fetch(self):
         if isinstance(self, GitSource):
             utils.system(["git", "clean", "-xdf"], cwd=self.sourceDir())
         return Qt5CorePackageBase.fetch(self)
 
     def compile(self):
         env = {}
         if CraftCore.compiler.isMacOS:
             # we need mac's version of libtool here
             env["PATH"] = f"/usr/bin/:{os.environ['PATH']}"
         if self.qtVer < CraftVersion("5.9") and CraftCore.compiler.isWindows:
             env["PATH"] = CraftCore.settings.get("Paths", "PYTHON27") + ";" + os.environ["PATH"]
         with utils.ScopedEnv(env):
             return Qt5CorePackageBase.compile(self)
 
     def install(self):
         if not Qt5CorePackageBase.install(self):
             return False
 
         if CraftCore.compiler.isWindows and os.path.isdir(os.path.join(self.imageDir(), "resources")):
             # apply solution for wrong install location of some important files
             # see: https://stackoverflow.com/a/35448081
             utils.mergeTree(os.path.join(self.imageDir(), "resources"),
                             os.path.join(self.imageDir(), "bin"))
         return True
 
 
 class Package(Qt5CoreSdkPackageBase):
     def __init__(self):
         Qt5CoreSdkPackageBase.__init__(self, classA=QtPackage, condition=not CraftCore.compiler.isMinGW())