diff --git a/business/model/message.go b/business/model/message.go
index 631705524..ad3be83d7 100644
--- a/business/model/message.go
+++ b/business/model/message.go
@@ -66,7 +66,7 @@ type ImMessageRecord struct {
 	Seq         int            `json:"seq"`
 	Weight      int            `json:"weight"`
 	Height      int            `json:"height"`
-	Audio       string         `orm:"type(blob)" json:"audio"`
+	Audio       []byte         `json:"audio"`
 	Key         string         `orm:"-" json:"key"`
 	UserInfo    *GetUserResult `orm:"-" json:"userInfo"`
 }