diff --git a/doc/src/overrides.md b/doc/src/overrides.md
index e630a109fb1..7d36e7864d6 100644
--- a/doc/src/overrides.md
+++ b/doc/src/overrides.md
@@ -93,12 +93,12 @@ specified.
 
 For backwards compatibility, `rust-toolchain` files also support a legacy
 format that only contains a toolchain name without any TOML encoding, e.g.
-just `nightly-2021-01-21`. This format is not available in
-`rust-toolchain.toml` files.
+just `nightly-2021-01-21`. The file has to be encoded in US-ASCII this case
+(if you are on Windows, check the encoding and that it does not starts with a
+BOM). The legacy format is not available in `rust-toolchain.toml` files.
 
 The `rust-toolchain.toml`/`rust-toolchain` files are suitable to check in to
-source control. The files have to be encoded in US-ASCII (if you are on
-Windows, check the encoding and that it does not starts with a BOM).
+source control.
 
 The toolchains named in these files have a more restricted form than `rustup`
 toolchains generally, and may only contain the names of the three release