diff --git a/migration/19.12/1912.sql b/migration/19.12/1912.sql
index 97927d93b918021b3e93489df7b4ee3ecb7fa047..d89681b3b87e2b61a1683e202cb09720b46a0387 100644
--- a/migration/19.12/1912.sql
+++ b/migration/19.12/1912.sql
@@ -430,7 +430,7 @@ CREATE VIEW res_view_attachments AS
 /* DATA */
 TRUNCATE TABLE custom_fields;
 INSERT INTO custom_fields (id, label, type, values) VALUES (1, 'Nature', 'select', '["Courrier simple", "Courriel", "Chronopost", "Pli numérique"]');
-INSERT INTO custom_fields (id, label, type, values) VALUES (2, 'N° recommandé', 'string', '""');
+INSERT INTO custom_fields (id, label, type, values) VALUES (2, 'N° recommandé', 'string', '[]');
 SELECT setval('custom_fields_id_seq', (select max(id)+1 from custom_fields), false);
 
 TRUNCATE TABLE indexing_models;