--- Widgets/CtrlCodeSel.c.orig	Wed Apr  6 18:07:40 1994
+++ Widgets/CtrlCodeSel.c	Wed Mar 16 19:22:29 2016
@@ -33,6 +33,8 @@
 #include <X11/Xaw/Label.h>
 #include <X11/Xaw/Command.h>
 
+#include <stdio.h>
+
 #include <CtrlCodeSelP.h>
 
 #define CLASS(field) controlCodeSelectorClassRec.control_code_selector_class.field