diff -u ncurses-6.2/config.sub ncurses-6.2-patched/config.sub
--- ncurses-6.2/config.sub	2019-09-12 01:56:40.000000000 +0200
+++ ncurses-6.2-patched/config.sub	2020-12-14 23:30:48.813959617 +0100
@@ -1343,7 +1343,7 @@
 	     | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
 	     | sym* | kopensolaris* | plan9* \
 	     | amigaos* | amigados* | msdos* | newsos* | unicos* | aof* \
-	     | aos* | aros* | cloudabi* | sortix* | twizzler* \
+	     | aos* | aros* | cloudabi* | sortix* | twizzler* | serenity*  \
 	     | nindy* | vxsim* | vxworks* | ebmon* | hms* | mvs* \
 	     | clix* | riscos* | uniplus* | iris* | isc* | rtu* | xenix* \
 	     | knetbsd* | mirbsd* | netbsd* \