diff --git a/src/plugins/platforms/xcb/qxcbconnection.cpp b/src/plugins/platforms/xcb/qxcbconnection.cpp
index 07509697038..3fdc43a11d1 100644
--- a/src/plugins/platforms/xcb/qxcbconnection.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection.cpp
@@ -35,6 +35,10 @@
 #undef explicit
 #include <xcb/xinput.h>
 
+#if QT_CONFIG(xcb_xlib)
+#include "qt_xlib_wrapper.h"
+#endif
+
 QT_BEGIN_NAMESPACE
 
 using namespace Qt::StringLiterals;
@@ -1090,6 +1094,10 @@ void QXcbConnection::processXcbEvents(QEventLoop::ProcessEventsFlags flags)
         m_eventQueue->flushBufferedEvents();
     }
 
+#if QT_CONFIG(xcb_xlib)
+    qt_XFlush(static_cast<Display *>(xlib_display()));
+#endif
+
     xcb_flush(xcb_connection());
 }