diff --git a/crates/matrix-sdk-common/src/ttl_cache.rs b/crates/matrix-sdk-common/src/ttl_cache.rs
index 4d0738da0..49048f020 100644
--- a/crates/matrix-sdk-common/src/ttl_cache.rs
+++ b/crates/matrix-sdk-common/src/ttl_cache.rs
@@ -212,7 +212,7 @@ fn now_timestamp_ms() -> f64 {
 
 /// The default timestamp if it is missing during deserialization.
 ///
-/// We expect that value that was serialized always has an expiry time, so the
+/// We expect that a value that was serialized always has an expiry time, so the
 /// default is `Some(0.0)`.
 fn default_timestamp() -> Option<f64> {
     Some(0.0)