diff --git a/installer/data/mysql/atomicupdate/bug_18915_-_modifying_patron_note_notice.sql b/installer/data/mysql/atomicupdate/bug_18915_-_modifying_patron_note_notice.sql
index 80035b22d1..8fd6b6e974 100644
--- a/installer/data/mysql/atomicupdate/bug_18915_-_modifying_patron_note_notice.sql
+++ b/installer/data/mysql/atomicupdate/bug_18915_-_modifying_patron_note_notice.sql
@@ -1 +1,4 @@
+-- For installations having the note already
 UPDATE letter SET code = 'CHECKOUT_NOTE', name = 'Checkout note on item set by patron', title = 'Checkout note', content = REPLACE(content, "<<biblio.item>>", "<<biblio.title>>") WHERE code = 'PATRON_NOTE';
+-- For installations coming from 17.11
+INSERT IGNORE INTO `letter` (`module`, `code`, `branchcode`, `name`, `is_html`, `title`, `content`, `message_transport_type`) VALUES ('circulation', 'CHECKOUT_NOTE', '', 'Checkout note on item set by patron', '0', 'Checkout note', '<<borrowers.firstname>> <<borrowers.surname>> has added a note to the item <<biblio.title>> - <<biblio.author>> (<<biblio.biblionumber>>).','email');