diff --git a/addons/account/models/account_invoice.py b/addons/account/models/account_invoice.py
index 8735aa0fec0..8486397b300 100644
--- a/addons/account/models/account_invoice.py
+++ b/addons/account/models/account_invoice.py
@@ -1459,7 +1459,7 @@ class AccountInvoiceLine(models.Model):
         ondelete='set null', index=True, oldname='uos_id')
     product_id = fields.Many2one('product.product', string='Product',
         ondelete='restrict', index=True)
-    product_image = fields.Binary('Product Image', related="product_id.image", store=False)
+    product_image = fields.Binary('Product Image', related="product_id.image", store=False, readonly=True)
     account_id = fields.Many2one('account.account', string='Account',
         required=True, domain=[('deprecated', '=', False)],
         default=_default_account,