diff --git a/tglog.go b/tglog.go
index 8257c7a..f95d160 100644
--- a/tglog.go
+++ b/tglog.go
@@ -78,7 +78,6 @@ func (this *tgLog) AddCustomLog(
 	accountId string,
 	distinctId string,
 	ip string,
-	eventName string,
 	prop map[string]interface{}) {
 	logObj := struct {
 		AccountId  string            `json:"#account_id"`
@@ -93,7 +92,7 @@ func (this *tgLog) AddCustomLog(
 		DistinctId: distinctId,
 		Type:       "track",
 		Time:       q5.FormatUnixDateTime(_app.GetRealSeconds(), _app.GetLocation()),
-		EventName:  eventName,
+		EventName:  "custom_event",
 		Ip:         ip,
 		Properties: prop,
 	}