diff --git a/hw/xwin/winmonitors.c b/hw/xwin/winmonitors.c
index 07532f6f5..76063d300 100644
--- a/hw/xwin/winmonitors.c
+++ b/hw/xwin/winmonitors.c
@@ -27,6 +27,10 @@ from The Open Group.
 
 */
 
+#ifdef HAVE_XWIN_CONFIG_H
+#include <xwin-config.h>
+#endif
+
 #include "win.h"
 #include "winmonitors.h"