diff --git a/rs/Cargo.toml b/rs/Cargo.toml
index 69e8781..730606e 100644
--- a/rs/Cargo.toml
+++ b/rs/Cargo.toml
@@ -26,3 +26,7 @@ serde = ["dep:serde", "nebu/serde", "lens/serde"]
[dev-dependencies]
serde_json = "1"
postcard = { version = "1", features = ["alloc"] }
+
+example
+name = "legacy_wire_cost"
+required-features = ["serde"]