diff --git a/ports/qt5-base/patches/qmake-arm64.patch b/ports/qt5-base/patches/qmake-arm64.patch
new file mode 100644
index 0000000000..17ba77b5c6
--- /dev/null
+++ b/ports/qt5-base/patches/qmake-arm64.patch
@@ -0,0 +1,18 @@
+diff --git a/qmake/library/qmakeevaluator.cpp b/qmake/library/qmakeevaluator.cpp
+index df3f92d7d5df..0ee8cdbf11e1 100644
+--- a/qmake/library/qmakeevaluator.cpp
++++ b/qmake/library/qmakeevaluator.cpp
+@@ -1046,6 +1046,11 @@ void QMakeEvaluator::loadDefaults()
+     case PROCESSOR_ARCHITECTURE_AMD64:
+         archStr = ProString("x86_64");
+         break;
++# endif
++# ifdef PROCESSOR_ARCHITECTURE_ARM64
++    case PROCESSOR_ARCHITECTURE_ARM64:
++        archStr = ProString("arm64");
++        break;
+ # endif
+     case PROCESSOR_ARCHITECTURE_INTEL:
+         archStr = ProString("x86");
+-- 
+2.16.3
diff --git a/ports/qt5-base/portfile.cmake b/ports/qt5-base/portfile.cmake
index 48fefd8c65..6e2fe1b04d 100644
--- a/ports/qt5-base/portfile.cmake
+++ b/ports/qt5-base/portfile.cmake
@@ -76,6 +76,8 @@ qt_download_submodule(  OUT_SOURCE_PATH SOURCE_PATH
                             patches/fix_angle.patch            # Failed to create OpenGL context for format QSurfaceFormat ...
                             patches/mingw9.patch               # Fix compile with MinGW-W64 9.0.0: Redefinition of 'struct _FILE_ID_INFO'
                             patches/XKB_KEY_dead_lowline.patch # https://bugreports.qt.io/browse/QTBUG-117950
+							
+                            patches/qmake-arm64.patch          # Fix by Oliver Wolff to support ARM64 hosts on Windows
                     )
 
 # Remove vendored dependencies to ensure they are not picked up by the build
diff --git a/ports/qt5-base/vcpkg.json b/ports/qt5-base/vcpkg.json
index 6e6214c4f6..579c9d9657 100644
--- a/ports/qt5-base/vcpkg.json
+++ b/ports/qt5-base/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "qt5-base",
   "version": "5.15.15",
+  "port-version": 1,
   "description": "Qt Base provides the basic non-GUI functionality required by all Qt applications.",
   "homepage": "https://www.qt.io/",
   "license": null,
diff --git a/ports/qtbase/portfile.cmake b/ports/qtbase/portfile.cmake
index 3b3c483377..6ad3432eef 100644
--- a/ports/qtbase/portfile.cmake
+++ b/ports/qtbase/portfile.cmake
@@ -22,6 +22,7 @@ set(${PORT}_PATCHES
         fix-host-aliasing.patch
         fix_deploy_windows.patch
         fix-link-lib-discovery.patch
+        qmake-arm64.patch
 )
 
 if(VCPKG_TARGET_IS_WINDOWS AND NOT VCPKG_TARGET_IS_MINGW)
diff --git a/ports/qtbase/qmake-arm64.patch b/ports/qtbase/qmake-arm64.patch
new file mode 100644
index 0000000000..17ba77b5c6
--- /dev/null
+++ b/ports/qtbase/qmake-arm64.patch
@@ -0,0 +1,18 @@
+diff --git a/qmake/library/qmakeevaluator.cpp b/qmake/library/qmakeevaluator.cpp
+index df3f92d7d5df..0ee8cdbf11e1 100644
+--- a/qmake/library/qmakeevaluator.cpp
++++ b/qmake/library/qmakeevaluator.cpp
+@@ -1046,6 +1046,11 @@ void QMakeEvaluator::loadDefaults()
+     case PROCESSOR_ARCHITECTURE_AMD64:
+         archStr = ProString("x86_64");
+         break;
++# endif
++# ifdef PROCESSOR_ARCHITECTURE_ARM64
++    case PROCESSOR_ARCHITECTURE_ARM64:
++        archStr = ProString("arm64");
++        break;
+ # endif
+     case PROCESSOR_ARCHITECTURE_INTEL:
+         archStr = ProString("x86");
+-- 
+2.16.3
diff --git a/ports/qtbase/vcpkg.json b/ports/qtbase/vcpkg.json
index 935f2ab4a7..0e49eca8e9 100644
--- a/ports/qtbase/vcpkg.json
+++ b/ports/qtbase/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "qtbase",
   "version": "6.7.3",
+  "port-version": 1,
   "description": "Qt Base (Core, Gui, Widgets, Network, ...)",
   "homepage": "https://www.qt.io/",
   "license": null,
diff --git a/versions/baseline.json b/versions/baseline.json
index c781ddea2c..a320a69094 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -7342,7 +7342,7 @@
     },
     "qt5-base": {
       "baseline": "5.15.15",
-      "port-version": 0
+      "port-version": 1
     },
     "qt5-canvas3d": {
       "baseline": "0",
@@ -7510,7 +7510,7 @@
     },
     "qtbase": {
       "baseline": "6.7.3",
-      "port-version": 0
+      "port-version": 1
     },
     "qtcharts": {
       "baseline": "6.7.3",
diff --git a/versions/q-/qt5-base.json b/versions/q-/qt5-base.json
index 2a85756ca1..1a8ba0fc74 100644
--- a/versions/q-/qt5-base.json
+++ b/versions/q-/qt5-base.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "6ae808ff9831e8fc3c9f31e0ec0ac71b2e9d3a4e",
+      "version": "5.15.15",
+      "port-version": 1
+    },
     {
       "git-tree": "99dfc2c88d6a863afc5eef00463166c50e5e12d2",
       "version": "5.15.15",
diff --git a/versions/q-/qtbase.json b/versions/q-/qtbase.json
index bc0d445cf4..7614433c22 100644
--- a/versions/q-/qtbase.json
+++ b/versions/q-/qtbase.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "f176facc532ba6e294f1627343e8f7c3ee686676",
+      "version": "6.7.3",
+      "port-version": 1
+    },
     {
       "git-tree": "175c7c5f08049a07e1b18f39e622e82a60a16147",
       "version": "6.7.3",