diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index 09e45e35b..4b7f7a791 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -180,6 +180,9 @@ typedef union {
     krb5_flags i;
 } krb5_kdc_flags;
 
+#define KRB5_GC_CACHED		1
+#define KRB5_GC_USER_USER	2
+
 typedef struct krb5_creds {
     krb5_principal client;
     krb5_principal server;