diff --git a/README.md b/README.md
index 9d568010..48d2b47d 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ You may be looking for:
 #[macro_use]
 extern crate serde_derive;
 
+extern crate serde;
 extern crate serde_json;
 
 #[derive(Serialize, Deserialize, Debug)]