diff --git a/crates/matrix-sdk-crypto-js/src/encryption.rs b/crates/matrix-sdk-crypto-js/src/encryption.rs
index 4ee6d6200..a817e7cd9 100644
--- a/crates/matrix-sdk-crypto-js/src/encryption.rs
+++ b/crates/matrix-sdk-crypto-js/src/encryption.rs
@@ -1,3 +1,5 @@
+//! Encryption types & siblings.
+
 use std::time::Duration;
 
 use wasm_bindgen::prelude::*;