diff --git a/chain/actors/version.go b/chain/actors/version.go
index 2173a320d..385ff592f 100644
--- a/chain/actors/version.go
+++ b/chain/actors/version.go
@@ -18,6 +18,8 @@ func VersionForNetwork(version network.Version) Version {
 	switch version {
 	case network.Version0, network.Version1, network.Version2, network.Version3:
 		return Version0
+	case network.Version4:
+		return Version2
 	default:
 		panic(fmt.Sprintf("unsupported network version %d", version))
 	}