--- nono/config-nono.h.in	2026/04/29 17:04:33	1.1.1.2
+++ nono/config-nono.h.in	2026/04/29 17:04:48	1.1.1.3
@@ -25,6 +25,7 @@
 #undef HAVE___ATTRIBUTE_NO_SANITIZE
 #undef HAVE___ATTRIBUTE_PACKED
 #undef HAVE___ATTRIBUTE_UNUSED
+#undef HAVE_ICONV_CONST
 #undef HAVE_PTHREAD_SETNAME_NP_name
 #undef HAVE_PTHREAD_SETNAME_NP_th_name
 #undef HAVE_PTHREAD_SETNAME_NP_th_name_arg