diff --git a/business/model/message.go b/business/model/message.go
index ecd7c3550..a70358bce 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"`
-	AudioLength int            `json:"audioLength"`
+	AudioLength string         `json:"audioLength"`
 	Key         string         `orm:"-" json:"key"`
 	UserInfo    *GetUserResult `orm:"-" json:"userInfo"`
 }