diff --git a/doc/src/sgml/pgstatstatements.sgml b/doc/src/sgml/pgstatstatements.sgml
index e235504e9a9..a0c315aa974 100644
--- a/doc/src/sgml/pgstatstatements.sgml
+++ b/doc/src/sgml/pgstatstatements.sgml
@@ -740,6 +740,7 @@
 # postgresql.conf
 shared_preload_libraries = 'pg_stat_statements'
 
+compute_query_id = on
 pg_stat_statements.max = 10000
 pg_stat_statements.track = all
 </programlisting>