diff --git a/internal/config/config.go b/internal/config/config.go
index 6d3d3e641..706684702 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -151,7 +151,7 @@ var SubSystemsDynamic = set.CreateStringSet(
 )
 
 // SubSystemsSingleTargets - subsystems which only support single target.
-var SubSystemsSingleTargets = set.CreateStringSet([]string{
+var SubSystemsSingleTargets = set.CreateStringSet(
 	CredentialsSubSys,
 	SiteSubSys,
 	RegionSubSys,
@@ -167,7 +167,9 @@ var SubSystemsSingleTargets = set.CreateStringSet([]string{
 	IdentityPluginSubSys,
 	HealSubSys,
 	ScannerSubSys,
-}...)
+	SubnetSubSys,
+	CallhomeSubSys,
+)
 
 // Constant separators
 const (