diff --git a/config.sub b/config.sub
index 14b5150..b541768 100644
--- a/config.sub
+++ b/config.sub
@@ -1722,7 +1722,7 @@ case $os in
 	     | skyos* | haiku* | rdos* | toppers* | drops* | es* \
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
-	     | nsk* | powerunix* | genode* | zvmoe* )
+	     | nsk* | powerunix* | genode* | zvmoe* | serenity* )
 		;;
 	# This one is extra strict with allowed versions
 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)