diff --git a/addons/stock_account/models/product.py b/addons/stock_account/models/product.py
index c356096d4e9..41efa20d3fb 100644
--- a/addons/stock_account/models/product.py
+++ b/addons/stock_account/models/product.py
@@ -236,16 +236,16 @@ class ProductProduct(models.Model):
 
         svl_vals_list = []
         company_id = self.env.company
+        price_unit_prec = self.env['decimal.precision'].precision_get('Product Price')
+        rounded_new_price = float_round(new_price, precision_digits=price_unit_prec)
         for product in self:
             if product.cost_method not in ('standard', 'average'):
                 continue
             quantity_svl = product.sudo().quantity_svl
             if float_compare(quantity_svl, 0.0, precision_rounding=product.uom_id.rounding) <= 0:
                 continue
-            digits = self.env['decimal.precision'].precision_get('Product Price')
-            rounded_new_price = float_round(new_price, precision_digits=digits)
-            diff = rounded_new_price - product.standard_price
-            value = company_id.currency_id.round(quantity_svl * diff)
+            value_svl = product.sudo().value_svl
+            value = company_id.currency_id.round((rounded_new_price * quantity_svl) - value_svl)
             if company_id.currency_id.is_zero(value):
                 continue
 
diff --git a/addons/stock_account/tests/test_stockvaluation.py b/addons/stock_account/tests/test_stockvaluation.py
index 84638b82b15..c1f3ee2d36b 100644
--- a/addons/stock_account/tests/test_stockvaluation.py
+++ b/addons/stock_account/tests/test_stockvaluation.py
@@ -3968,3 +3968,16 @@ class TestStockValuation(TransactionCase):
         self.assertEqual(self.product1.quantity_svl, 12)
         move.quantity_done = 2
         self.assertEqual(self.product1.quantity_svl, 24)
+
+    def test_average_manual_price_change(self):
+        """
+        When doing a Manual Price Change, an SVL is created to update the value_svl.
+        This test check that the value of this SVL is correct and does result in new_std_price * quantity.
+        To do so, we create 2 In moves, which result in a standard price rounded at $5.29, the non-rounded value ≃ 5.2857.
+        Then we update the standard price to $7
+        """
+        self.product1.categ_id.property_cost_method = 'average'
+        self._make_in_move(self.product1, 5, unit_cost=5)
+        self._make_in_move(self.product1, 2, unit_cost=6)
+        self.product1.write({'standard_price': 7})
+        self.assertEqual(self.product1.value_svl, 49)