diff --git a/src/plugins/platforms/windows/qwindowsfontdatabase.cpp b/src/plugins/platforms/windows/qwindowsfontdatabase.cpp
index b96ae6f3da9..7741aeb9a82 100644
--- a/src/plugins/platforms/windows/qwindowsfontdatabase.cpp
+++ b/src/plugins/platforms/windows/qwindowsfontdatabase.cpp
@@ -51,6 +51,8 @@
 #include <QtCore/qmath.h>
 #include <QtCore/QDebug>
 
+#include <wchar.h>
+
 #if !defined(QT_NO_DIRECTWRITE)
 #    include <dwrite.h>
 #    include <d2d1.h>
diff --git a/src/plugins/platforms/windows/qwindowsfontdatabase_ft.cpp b/src/plugins/platforms/windows/qwindowsfontdatabase_ft.cpp
index 1c4a855255b..a7861998b94 100644
--- a/src/plugins/platforms/windows/qwindowsfontdatabase_ft.cpp
+++ b/src/plugins/platforms/windows/qwindowsfontdatabase_ft.cpp
@@ -51,6 +51,8 @@
 #include <QtGui/QGuiApplication>
 #include <QtGui/QFontDatabase>
 
+#include <wchar.h>
+
 static inline QFontDatabase::WritingSystem writingSystemFromScript(const QString &scriptName)
 {
     if (scriptName == QStringLiteral("Western")