diff --git a/ext/cvode/source/cvbandpre.c b/ext/cvode/source/cvbandpre.c
index f2ab6d6fe..7686f87bd 100755
--- a/ext/cvode/source/cvbandpre.c
+++ b/ext/cvode/source/cvbandpre.c
@@ -10,6 +10,8 @@
  *                                                                *
  ******************************************************************/
 
+#include <stdio.h>
+#include <stdlib.h>
 #include "cvbandpre.h"
 #include "cvode.h"
 #include "llnltyps.h"