diff --git a/plugin/manager/timer/msg.go b/plugin/manager/timer/msg.go
index 64de291044..0633ba77c9 100644
--- a/plugin/manager/timer/msg.go
+++ b/plugin/manager/timer/msg.go
@@ -6,6 +6,9 @@ import (
 )
 
 func (t *Timer) sendmsg(grp int64, ctx *zero.Ctx) {
+	if ctx == nil {
+		return
+	}
 	ctx.Event = new(zero.Event)
 	ctx.Event.GroupID = grp
 	if t.URL == "" {
diff --git a/plugin/manager/timer/timer.go b/plugin/manager/timer/timer.go
index 43a7254017..d42a1e0bf1 100644
--- a/plugin/manager/timer/timer.go
+++ b/plugin/manager/timer/timer.go
@@ -77,7 +77,13 @@ func (c *Clock) RegisterTimer(ts *Timer, save, isinit bool) bool {
 		if isinit {
 			process.GlobalInitMutex.Unlock()
 		}
-		eid, err := c.cron.AddFunc(ts.Cron, func() { ts.sendmsg(ts.GrpID, ctx) })
+		eid, err := c.cron.AddFunc(ts.Cron, func() {
+			bot := ctx
+			if ts.SelfID != 0 {
+				bot = zero.GetBot(ts.SelfID)
+			}
+			ts.sendmsg(ts.GrpID, bot)
+		})
 		if err == nil {
 			c.entmu.Lock()
 			c.entries[key] = eid