diff --git a/src/bin/pg_upgrade/check.c b/src/bin/pg_upgrade/check.c
index 9cdeb15bd51..c77ebeff883 100644
--- a/src/bin/pg_upgrade/check.c
+++ b/src/bin/pg_upgrade/check.c
@@ -2383,9 +2383,9 @@ check_old_cluster_subscription_state(void)
 	 * states listed below are not supported:
 	 *
 	 * a) SUBREL_STATE_DATASYNC: A relation upgraded while in this state would
-	 * retain a replication slot, which could not be dropped by the sync
-	 * worker spawned after the upgrade because the subscription ID used for
-	 * the slot name won't match anymore.
+	 * retain a replication slot and origin. The sync worker spawned after the
+	 * upgrade cannot drop them because the subscription ID used for the slot
+	 * and origin name no longer matches.
 	 *
 	 * b) SUBREL_STATE_SYNCDONE: A relation upgraded while in this state would
 	 * retain the replication origin when there is a failure in tablesync