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-rw-r--r--doc/src/sgml/protocol.sgml5
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index e519ff96b90..a8a09e4f0ec 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -4734,7 +4734,10 @@ StartupMessage (F)
set at backend start time might be listed. Such settings
will be applied during backend start (after parsing the
command-line options if any). The values will act as
- session defaults.
+ session defaults. Spaces in option values need to be escaped
+ with a backslash (<literal>\</>). A literal backslash can be
+ passed by escaping it with another backslash
+ (i.e <literal>\\</>).
</para>
</listitem>
</varlistentry>