--- ocamlnet-4.0.3.old/src/nettls-gnutls/nettls_gnutls_bindings_stubs.c	2015-06-17 14:44:42.016525239 +0100
+++ ocamlnet-4.0.3/src/nettls-gnutls/nettls_gnutls_bindings_stubs.c	2015-06-17 14:55:34.252866764 +0100
@@ -2847,9 +2847,11 @@
 #ifdef HAVE_ENUM_GNUTLS_SUPPLEMENTAL_USER_MAPPING_DATA
     case GNUTLS_SUPPLEMENTAL_USER_MAPPING_DATA: return Val_long(93721039);
 #endif
+#if 0
 #ifdef HAVE_ENUM_GNUTLS_SUPPLEMENTAL_UNKNOWN
     case GNUTLS_SUPPLEMENTAL_UNKNOWN: return Val_long(785140586);
 #endif
+#endif
     default: break;
   };
   failwith("wrap_gnutls_supplemental_data_format_type_t: unexpected value");