--- a/config.sub	2019-10-31 17:49:54.000000000 +0300
+++ b/config.sub	2020-09-10 17:03:14.219589932 +0300
@@ -1417,7 +1417,8 @@
 	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
 	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
 	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
-	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox*)
+	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* \
+	      | -serenity* )
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-qnx*)