--- OLD/xc/lib/Xmu/WidgetNode.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/lib/Xmu/WidgetNode.c	Thu Jan  1 00:00:00 1970
@@ -29,6 +29,7 @@
 
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <X11/Xos.h>
 #include <X11/IntrinsicP.h>
 #include <X11/Xaw/Cardinals.h>