diff --git a/api/agent.go b/api/agent.go
index e1972f8f0c..5ab57ffa53 100644
--- a/api/agent.go
+++ b/api/agent.go
@@ -407,6 +407,7 @@ type Upstream struct {
 	LocalBindPort        int                    `json:",omitempty"`
 	Config               map[string]interface{} `json:",omitempty" bexpr:"-"`
 	MeshGateway          MeshGatewayConfig      `json:",omitempty"`
+	CentrallyConfigured  bool                   `json:",omitempty"`
 }
 
 // Agent can be used to query the Agent endpoints