diff -Naurp buddy-2.4-orig/src/bddtest.cxx buddy-2.4/src/bddtest.cxx
--- buddy-2.4-orig/src/bddtest.cxx	2004-06-25 07:22:26.000000000 -0600
+++ buddy-2.4/src/bddtest.cxx	2009-02-09 22:14:19.000000000 -0600
@@ -28,6 +28,7 @@
 ========================================================================*/
 
 #include <string>
+#include <cstdlib>
 #include "bdd.h"
 #include "bvec.h"
 
diff -Naurp buddy-2.4-orig/examples/bddcalc/parser_.h buddy-2.4/examples/bddcalc/parser_.h
--- buddy-2.4-orig/examples/bddcalc/parser_.h	2004-06-25 07:21:43.000000000 -0600
+++ buddy-2.4/examples/bddcalc/parser_.h	2009-02-09 22:21:09.000000000 -0600
@@ -9,6 +9,7 @@
 #define _PARSER_H
 
 #include <stdio.h>
+#include <stdlib.h>
 #include "bdd.h"
 
 #define MAXIDLEN 32  /* Max. number of allowed characters in an identifier */