diff --git a/src/gui/rhi/cs_tdr.h b/src/gui/rhi/cs_tdr_p.h
similarity index 95%
rename from src/gui/rhi/cs_tdr.h
rename to src/gui/rhi/cs_tdr_p.h
index f80cb3a498..620a4a101d 100644
--- a/src/gui/rhi/cs_tdr.h
+++ b/src/gui/rhi/cs_tdr_p.h
@@ -34,7 +34,21 @@
 **
 ****************************************************************************/
 
-#include <qglobal.h>
+#ifndef CS_TDR_P_H
+#define CS_TDR_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qglobal.h>
 
 #ifdef Q_OS_WIN
 
@@ -207,3 +221,5 @@ const BYTE g_killDeviceByTimingOut[] =
 };
 
 #endif // Q_OS_WIN
+
+#endif // CS_TDR_P_H
diff --git a/src/gui/rhi/qrhid3d11.cpp b/src/gui/rhi/qrhid3d11.cpp
index 1d2f3cfa80..0b1822c0f5 100644
--- a/src/gui/rhi/qrhid3d11.cpp
+++ b/src/gui/rhi/qrhid3d11.cpp
@@ -36,7 +36,7 @@
 
 #include "qrhid3d11_p_p.h"
 #include "qshader_p.h"
-#include "cs_tdr.h"
+#include "cs_tdr_p.h"
 #include <QWindow>
 #include <QOperatingSystemVersion>
 #include <qmath.h>