diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index dfc40a8d1..fb0136ac2 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -416,9 +416,14 @@ typedef struct krb5_context_data {
     char error_buf[256];
     krb5_addresses *ignore_addresses;
     char *default_cc_name;
-    int pkinit_win2k_compatible;
+    int pkinit_flags;
 } krb5_context_data;
 
+enum {
+    KRB5_PKINIT_WIN2K		= 1,	/* wire compatible with Windows 2000 */
+    KRB5_PKINIT_PACKET_CABLE	= 2	/* use packet cable standard */
+};
+
 typedef struct krb5_ticket {
     EncTicketPart ticket;
     krb5_principal client;