diff --git a/src/backend/utils/misc/guc_tables.c b/src/backend/utils/misc/guc_tables.c
index 4eaeca89f2c..f596fda568c 100644
--- a/src/backend/utils/misc/guc_tables.c
+++ b/src/backend/utils/misc/guc_tables.c
@@ -998,7 +998,7 @@ struct config_bool ConfigureNamesBool[] =
 		{"enable_self_join_elimination", PGC_USERSET, QUERY_TUNING_METHOD,
 			gettext_noop("Enables removal of unique self-joins."),
 			NULL,
-			GUC_EXPLAIN | GUC_NOT_IN_SAMPLE
+			GUC_EXPLAIN
 		},
 		&enable_self_join_elimination,
 		true,
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ff56a1f0732..bcd4e67f43e 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -427,6 +427,7 @@
 #enable_tidscan = on
 #enable_group_by_reordering = on
 #enable_distinct_reordering = on
+#enable_self_join_elimination = on
 
 # - Planner Cost Constants -