diff --git a/attachments.go b/attachments.go
index 241055fad..de4d75888 100644
--- a/attachments.go
+++ b/attachments.go
@@ -64,8 +64,7 @@ type Attachment struct {
 	Fallback string `json:"fallback,omitempty"`
 
 	CallbackID string `json:"callback_id,omitempty"`
-	// TODO may be string?
-	//ID         int    `json:"id,omitempty"`
+	ID         int    `json:"id,omitempty"`
 
 	AuthorID      string `json:"author_id,omitempty"`
 	AuthorName    string `json:"author_name,omitempty"`