diff --git a/routers/api/v1/activitypub/repository.go b/routers/api/v1/activitypub/repository.go
index c59b3e5f65..e2f65bd015 100644
--- a/routers/api/v1/activitypub/repository.go
+++ b/routers/api/v1/activitypub/repository.go
@@ -73,6 +73,12 @@ func RepositoryInbox(ctx *context.APIContext) {
 	log.Info("RepositoryInbox: repo %v, %v", ctx.Repo.Repository.OwnerName, ctx.Repo.Repository.Name)
 	opt := web.GetForm(ctx).(*forgefed.Star)
 
+	err := opt.ValidateStar()
+
+	if err != nil {
+		panic(err)
+	}
+
 	log.Info("RepositoryInbox: Activity.Source %v", opt.Source)
 	log.Info("RepositoryInbox: Activity.Actor %v", opt.Actor)