diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index 7cddac9421e..56ac0b9af69 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -297,8 +297,14 @@ class AccountMove(models.Model):
         help='If this checkbox is ticked, this entry will be automatically posted at its date.')
 
     # ==== Reverse feature fields ====
-    reversed_entry_id = fields.Many2one('account.move', string="Reversal of", readonly=True, copy=False,
-        check_company=True)
+    reversed_entry_id = fields.Many2one(
+        comodel_name='account.move',
+        string="Reversal of",
+        index='btree_not_null',
+        readonly=True,
+        copy=False,
+        check_company=True
+    )
     reversal_move_id = fields.One2many('account.move', 'reversed_entry_id')
 
     # =========================================================