diff --git a/doc/src/sgml/ref/pg_receivexlog.sgml b/doc/src/sgml/ref/pg_receivexlog.sgml
index 0c99744ece..fd787649e4 100644
--- a/doc/src/sgml/ref/pg_receivexlog.sgml
+++ b/doc/src/sgml/ref/pg_receivexlog.sgml
@@ -50,7 +50,7 @@ PostgreSQL documentation
 
   <para>
    Unlike the standby's WAL receiver, <application>pg_receivexlog</>
-   flushes WAL data only when WAL file is closed, by default.
+   flushes WAL data only when a WAL file is closed, by default.
    <literal>--synchronous</> option must be specified to flush WAL data
    in real time and ensure it's safely flushed to disk.
   </para>