diff --git a/ruma-api-macros/src/lib.rs b/ruma-api-macros/src/lib.rs
index 586e0014..6249f4f4 100644
--- a/ruma-api-macros/src/lib.rs
+++ b/ruma-api-macros/src/lib.rs
@@ -100,7 +100,7 @@ mod api;
 /// There are also a few special attributes available to control how the struct is converted into a
 /// `http::Request`:
 ///
-/// *   `#[ruma_api(header = "HEADER_NAME")]`: Fields with this attribute will be treated as HTTP
+/// *   `#[ruma_api(header = HEADER_NAME)]`: Fields with this attribute will be treated as HTTP
 ///     headers on the request.
 ///     The value must implement `AsRef<str>`.
 ///     Generally this is a `String`.