diff --git a/openupgrade_scripts/scripts/crm/19.0.1.9/post-migration.py b/openupgrade_scripts/scripts/crm/19.0.1.9/post-migration.py
index 9b1da761b97..782abd06fdc 100644
--- a/openupgrade_scripts/scripts/crm/19.0.1.9/post-migration.py
+++ b/openupgrade_scripts/scripts/crm/19.0.1.9/post-migration.py
@@ -8,7 +8,11 @@ def _migrate_lead_mobile(env):
         env.cr,
         """
         UPDATE crm_lead
-        SET phone = CONCAT(COALESCE(phone, ''), mobile)
+        SET phone = CONCAT(
+            COALESCE(phone, ''),
+            CASE WHEN COALESCE(phone, '') != '' THEN ' | ' ELSE '' END,
+            mobile
+        )
         WHERE COALESCE(mobile, '') != ''
         """,
     )