diff --git a/id/system.go b/id/system.go
index 0fe640a26fc1936d6414648f282ffa683c59ec9c..844d8211bdf0fbf3d6617be57b5f9d3f4f332b91 100644
--- a/id/system.go
+++ b/id/system.go
@@ -9,7 +9,7 @@ type SystemID struct{}
 func (t *SystemID) Type() string { return Space }
 
 func (t *SystemID) String() string {
-	return "/" + System
+	return string(Separator) + System
 }
 
 func (t *SystemID) ToMap() map[string]any {