diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index 44db1b918..d1ab87029 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -722,6 +722,13 @@ krb5_425_conv_principal(krb5_context context,
 			const char *realm,
 			krb5_principal *princ);
 
+krb5_error_code
+krb5_524_conv_principal(krb5_context context,
+			const krb5_principal principal,
+			char *name, 
+			char *instance,
+			char *realm);
+
 krb5_error_code
 krb5_sname_to_principal (krb5_context context,
 			 const char *hostname,