diff --git a/mdbx.h b/mdbx.h
index 36fd079d..cd6d61c5 100644
--- a/mdbx.h
+++ b/mdbx.h
@@ -1202,10 +1202,11 @@ LIBMDBX_API const char *mdbx_dump_val(const MDBX_val *key, char *const buf,
  *         In case single transaction after mdbx_env_sync, you may lose
  *         transaction itself, but not a whole database.
  *
- *      Nevertheless, MDBX_UTTERLY_NOSYNC provides ACI (without Durability) in
- *      case of a application crash, and therefore may be very useful in
- *      scenarios where data durability is not required over a system failure
- *      (e.g for short-lived data), or if you can ignore such risk.
+ *      Nevertheless, MDBX_UTTERLY_NOSYNC provides "weak" durability in case of
+ *      an application crash (but no durability on system failure), and
+ *      therefore may be very useful in scenarios where data durability is not
+ *      required over a system failure (e.g for short-lived data), or if you can
+ *      take such risk.
  *
  *      MDBX_UTTERLY_NOSYNC flag may be changed at any time using
  *      mdbx_env_set_flags(), but don't has effect if passed to mdbx_txn_begin()