diff --git a/reference/mongo/mongoclient/construct.xml b/reference/mongo/mongoclient/construct.xml
index 184c9445a0..262eb533ab 100644
--- a/reference/mongo/mongoclient/construct.xml
+++ b/reference/mongo/mongoclient/construct.xml
@@ -120,6 +120,32 @@ mongodb://[username:password@]host1[:port1][,host2[:port2:],...]/db
host list.
+
+
+ "fsync"
+
+
+ When fsync is set, all write operations on the
+ database will block until the database server has flushed its
+ database files to disk. This makes write operations a lot slower,
+ but it guarantees that the write operation has succeeded and
+ committed to disk. Please avoid using this
+ option and use the journal option instead,
+ perhaps in combination with the w option.
+
+
+
+
+ "journal"
+
+
+ When journal is set, all write operations on the
+ database will block until the database server has flushed the
+ journal to disk. This makes the write operations marginally slower,
+ but it guarantees that the write operation has succeeded and the
+ operation can be recovered in case of total system failure.
+
+
"password"