diff --git a/doc/user/persistence-architecture.xml b/doc/user/persistence-architecture.xml
index d1e7e46158a7d73bb7cb0fe9078a98f128f2aae4..7e61202c2c6ec41e27a476c142ac2ab341f9b241 100644
--- a/doc/user/persistence-architecture.xml
+++ b/doc/user/persistence-architecture.xml
@@ -60,7 +60,7 @@ example:
 
 <para>
 The master and the WAL writer threads communicate using asynchronous (yet reliable)
-messaging; the master theread, not being blocked on
+messaging; the master thread, not being blocked on
 WAL tasks, continues to handle requests quickly
 even at hight volumes of disk I/O. For instance, SELECT performance,
 provided SELECTs are run in their own connections, remains