diff --git a/lib/krb5/krb5-v4compat.h b/lib/krb5/krb5-v4compat.h
index 9334fdb2b..431aea049 100644
--- a/lib/krb5/krb5-v4compat.h
+++ b/lib/krb5/krb5-v4compat.h
@@ -36,6 +36,8 @@
 #ifndef __KRB5_V4COMPAT_H__
 #define __KRB5_V4COMPAT_H__
 
+#include "krb_err.h"
+
 /* 
  * This file must only be included with v4 compat glue stuff in
  * heimdal sources.