diff --git a/src/plugins/platforms/xcb/CMakeLists.txt b/src/plugins/platforms/xcb/CMakeLists.txt
index bb026e77e85..9ac281c4073 100644
--- a/src/plugins/platforms/xcb/CMakeLists.txt
+++ b/src/plugins/platforms/xcb/CMakeLists.txt
@@ -83,6 +83,8 @@ qt_internal_extend_target(XcbQpaPrivate CONDITION QT_FEATURE_draganddrop
 )
 
 qt_internal_extend_target(XcbQpaPrivate CONDITION QT_FEATURE_xcb_xlib
+    SOURCES
+        qt_xlib_wrapper.c qt_xlib_wrapper.h
     PUBLIC_LIBRARIES
         X11::XCB
         # special case begin
diff --git a/src/plugins/platforms/xcb/qt_xlib_wrapper.c b/src/plugins/platforms/xcb/qt_xlib_wrapper.c
new file mode 100644
index 00000000000..f4614e5504e
--- /dev/null
+++ b/src/plugins/platforms/xcb/qt_xlib_wrapper.c
@@ -0,0 +1,7 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+#include "qt_xlib_wrapper.h"
+
+#include <X11/Xlib.h>
+
+void qt_XFlush(Display *dpy) { XFlush(dpy); }
diff --git a/src/plugins/platforms/xcb/qt_xlib_wrapper.h b/src/plugins/platforms/xcb/qt_xlib_wrapper.h
new file mode 100644
index 00000000000..642dbdeadd3
--- /dev/null
+++ b/src/plugins/platforms/xcb/qt_xlib_wrapper.h
@@ -0,0 +1,17 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+#ifndef QT_XLIB_WRAPPER_H
+#define QT_XLIB_WRAPPER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    typedef struct _XDisplay Display;
+    void qt_XFlush(Display *dpy);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // QT_XLIB_WRAPPER_H