--- OLD/xc/lib/Xext/XLbx.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/lib/Xext/XLbx.c	Thu Jan  1 00:00:00 1970
@@ -22,6 +22,9 @@
  *
  * Author:  Keith Packard, Network Computing Devices
  */
+
+#include <stdio.h>
+
 #define NEED_EVENTS
 #define NEED_REPLIES
 #include "Xlibint.h"