diff --git a/rust/src/events/formats/mod.rs b/rust/src/events/formats/mod.rs
index 77dbfbbcc1..158abb50e5 100644
--- a/rust/src/events/formats/mod.rs
+++ b/rust/src/events/formats/mod.rs
@@ -14,7 +14,7 @@
  */
 
 //! Over-the-wire representations of Matrix events, parameterised by event
-//! format version.
+//! format version (i.e. the structure we parse the event JSON into).
 //!
 //! # Design
 //!