diff --git a/game/builtin/actor.go b/game/builtin/actor.go
index 867fdf0..aed64c9 100644
--- a/game/builtin/actor.go
+++ b/game/builtin/actor.go
@@ -10,6 +10,10 @@ type Actor struct {
 	guid int64
 }
 
+func (slf *Actor) SetGuid(guid int64) {
+	slf.guid = guid
+}
+
 func (slf *Actor) GetGuid() int64 {
 	return slf.guid
 }