diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index 5c18a436f..3f6e63e0f 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -753,7 +753,8 @@ enum {
 /* flags for krb5_unparse_name_flags */
 enum {
     KRB5_PRINCIPAL_UNPARSE_SHORT = 1,
-    KRB5_PRINCIPAL_UNPARSE_NO_REALM = 2
+    KRB5_PRINCIPAL_UNPARSE_NO_REALM = 2,
+    KRB5_PRINCIPAL_UNPARSE_NO_QUOTE = 4
 };
 
 typedef struct krb5_sendto_ctx *krb5_sendto_ctx;