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diff --git a/third_party/rust/serde_cbor/examples/readme.rs b/third_party/rust/serde_cbor/examples/readme.rs
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+// NOTE: This file should be kept in sync with README.md
+
+use serde_derive::{Deserialize, Serialize};
+use std::error::Error;
+use std::fs::File;
+
+// Types annotated with `Serialize` can be stored as CBOR.
+// To be able to load them again add `Deserialize`.
+#[derive(Debug, Serialize, Deserialize)]
+struct Mascot {
+    name: String,
+    species: String,
+    year_of_birth: u32,
+}
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let ferris = Mascot {
+        name: "Ferris".to_owned(),
+        species: "crab".to_owned(),
+        year_of_birth: 2015,
+    };
+
+    let ferris_file = File::create("examples/ferris.cbor")?;
+    // Write Ferris to the given file.
+    // Instead of a file you can use any type that implements `io::Write`
+    // like a HTTP body, database connection etc.
+    serde_cbor::to_writer(ferris_file, &ferris)?;
+
+    let tux_file = File::open("examples/tux.cbor")?;
+    // Load Tux from a file.
+    // Serde CBOR performs roundtrip serialization meaning that
+    // the data will not change in any way.
+    let tux: Mascot = serde_cbor::from_reader(tux_file)?;
+
+    println!("{:?}", tux);
+    // prints: Mascot { name: "Tux", species: "penguin", year_of_birth: 1996 }
+
+    Ok(())
+}