diff --git a/crdt-enc/src/lib.rs b/crdt-enc/src/lib.rs
index 21a681e..01bfbf3 100644
--- a/crdt-enc/src/lib.rs
+++ b/crdt-enc/src/lib.rs
@@ -204,8 +204,6 @@ pub struct Core<S, ST, C, KC> {
     storage: ST,
     cryptor: C,
     key_cryptor: KC,
-    // use sync `std::sync::Mutex` here because it has less overhead than async mutex, we are
-    // holding it for a very shot time and do not `.await` while the lock is held.
     data: LockBox<CoreMutData<S>>,
     supported_data_versions: Vec<Uuid>,
     current_data_version: Uuid,
diff --git a/crdt-enc/src/utils.rs b/crdt-enc/src/utils.rs
index 9627917..46edea4 100644
--- a/crdt-enc/src/utils.rs
+++ b/crdt-enc/src/utils.rs
@@ -126,7 +126,9 @@ where
     Ok(())
 }
 
-/// Prevents `await`s while the lock is held. Awaiting could cause deadlocking.
+/// Uses sync `std::sync::Mutex` because it has less overhead than async mutex. Its intended use is
+/// for short data accesses. Prevents `await`s while the lock is held. Awaiting could cause
+/// deadlocking.
 #[derive(Debug)]
 pub struct LockBox<T> {
     inner: SyncMutex<T>,