diff --git a/src/plugins/platforms/windows/qwindowstheme.cpp b/src/plugins/platforms/windows/qwindowstheme.cpp
index 66d261174ce..55ccfcc8f42 100644
--- a/src/plugins/platforms/windows/qwindowstheme.cpp
+++ b/src/plugins/platforms/windows/qwindowstheme.cpp
@@ -47,6 +47,7 @@
 
 #if QT_CONFIG(cpp_winrt) && !defined(Q_CC_CLANG)
 #   include <winrt/base.h>
+#   include <QtCore/private/qfactorycacheregistration_p.h>
 // Workaround for Windows SDK bug.
 // See https://github.com/microsoft/Windows.UI.Composition-Win32-Samples/issues/47
 namespace winrt::impl