diff --git a/internal/types/k8s.go b/internal/types/k8s.go
index 84750fe9..e865ed39 100644
--- a/internal/types/k8s.go
+++ b/internal/types/k8s.go
@@ -101,6 +101,8 @@ func KindOf(obj any) string {
 		return KindApisixGlobalRule
 	case *v2.ApisixPluginConfig:
 		return KindApisixPluginConfig
+	case *v2.ApisixUpstream:
+		return KindApisixUpstream
 	case *corev1.Pod:
 		return KindPod
 	case *v2.ApisixTls: