diff --git a/README.rst b/README.rst
index b336f3c2..0caa9874 100644
--- a/README.rst
+++ b/README.rst
@@ -30,7 +30,7 @@ pre-release version number (e.g., "0.1.1-dev.1" instead of "0.1.0").
 Local cargo config
 ==================
 
-This repository ships with a ``.cargo/config`` that replaces the crates.io
+This repository ships with a ``.cargo/config.toml`` that replaces the crates.io
 registry with packaged crates located in ``/usr/share/cargo/registry``.
 
 A similar config is also applied building with dh_cargo. Cargo.lock needs to be