diff --git a/routers/api/v1/notify/repo.go b/routers/api/v1/notify/repo.go
index 30357ebd3..936647e12 100644
--- a/routers/api/v1/notify/repo.go
+++ b/routers/api/v1/notify/repo.go
@@ -214,7 +214,7 @@ func ReadRepoNotifications(ctx *context.APIContext) {
 		targetStatus = models.NotificationStatusRead
 	}
 
-	changed := make([]*structs.NotificationThread, len(nl))
+	changed := make([]*structs.NotificationThread, 0, len(nl))
 
 	for _, n := range nl {
 		notif, err := models.SetNotificationStatus(n.ID, ctx.User, targetStatus)