--- Widgets/NumericPad.c.orig	Wed Apr  6 18:07:40 1994
+++ Widgets/NumericPad.c	Wed Mar 16 19:20:23 2016
@@ -33,6 +33,8 @@
 #include <X11/Xaw/Command.h>
 #include <X11/Xaw/AsciiText.h>
 
+#include <stdio.h>
+
 #include <NumericPadP.h>
 
 #define OCT  8