diff --git a/examples/gno.land/p/demo/grc/grc721/basic_nft.gno b/examples/gno.land/p/demo/grc/grc721/basic_nft.gno
index 412751405b2..43493b07bd5 100644
--- a/examples/gno.land/p/demo/grc/grc721/basic_nft.gno
+++ b/examples/gno.land/p/demo/grc/grc721/basic_nft.gno
@@ -71,8 +71,7 @@ func (s *basicNFT) TokenURI(tid TokenID) (string, error) {
 
 func (s *basicNFT) SetTokenURI(tid TokenID, tURI TokenURI) (bool, error) {
 	// check for invalid TokenID
-	owner, found := s.owners.Get(string(tid))
-	if !found {
+	if !s.exists() {
 		return false, ErrInvalidTokenId
 	}