diff --git a/SandboxiePlus/SandMan/stdafx.h b/SandboxiePlus/SandMan/stdafx.h
index 45be3698..b7806a39 100644
--- a/SandboxiePlus/SandMan/stdafx.h
+++ b/SandboxiePlus/SandMan/stdafx.h
@@ -108,6 +108,9 @@
 #include <QGridLayout>
 #include <QActionGroup>
 #include <QStandardPaths>
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+#include <QDesktopWidget>
+#endif
 
 // other includes