diff --git a/src/platformsupport/eglconvenience/qt_egl_p.h b/src/platformsupport/eglconvenience/qt_egl_p.h
index ea554927de..bf37d07fd8 100644
--- a/src/platformsupport/eglconvenience/qt_egl_p.h
+++ b/src/platformsupport/eglconvenience/qt_egl_p.h
@@ -52,6 +52,9 @@
 //
 
 #ifdef QT_EGL_NO_X11
+# ifndef EGL_NO_X11
+#  define EGL_NO_X11
+# endif
 # ifndef MESA_EGL_NO_X11_HEADERS
 #  define MESA_EGL_NO_X11_HEADERS // MESA
 # endif