diff --git a/hw/xwin/meson.build b/hw/xwin/meson.build
index 7e1375cfd..72e4fe3c2 100644
--- a/hw/xwin/meson.build
+++ b/hw/xwin/meson.build
@@ -24,6 +24,8 @@ srcs_windows = [
 ]
 subdir('winclipboard')
 
+xwin_glx = []
+xwin_windowsdri = []
 if build_glx
     if build_windowsdri
         xwin_c_args += '-DXWIN_WINDOWS_DRI'