diff --git a/.arcconfig b/.arcconfig
--- a/.arcconfig
+++ b/.arcconfig
@@ -1,4 +1,5 @@
 {
-	"repository.callsign" : "P",
-	"phabricator.uri" : "https://reviews.freebsd.org/"
+	"phabricator.uri" : "https://reviews.freebsd.org/",
+	"arc.land.onto.default": "main",
+	"arc.land.onto": ["main"]
 }