diff --git a/common/constant/key.go b/common/constant/key.go
index 9df6585bc05305e253584f3b18a234957659c1f6..51d86aafb8962f5b42a52a8c937ea5575414c91d 100644
--- a/common/constant/key.go
+++ b/common/constant/key.go
@@ -244,7 +244,7 @@ const (
 	// HEALTH_ROUTE_ENABLED_KEY defines if use health router
 	HEALTH_ROUTE_ENABLED_KEY = "health.route.enabled"
 	// AttachmentKey in context in invoker
-	AttachmentKey = "attachment"
+	AttachmentKey = DubboCtxKey("attachment")
 )
 
 const (