diff --git a/hw/xwin/winmsgwindow.c b/hw/xwin/winmsgwindow.c
index 8067c693c..59f1da503 100644
--- a/hw/xwin/winmsgwindow.c
+++ b/hw/xwin/winmsgwindow.c
@@ -22,6 +22,10 @@
  *
  */
 
+#ifdef HAVE_XWIN_CONFIG_H
+#include <xwin-config.h>
+#endif
+
 #include "win.h"
 
 /*