diff --git a/addons/mrp_bom_cost/models/product.py b/addons/mrp_bom_cost/models/product.py
index 9af9b84d9d6..fc0f56be631 100644
--- a/addons/mrp_bom_cost/models/product.py
+++ b/addons/mrp_bom_cost/models/product.py
@@ -50,6 +50,8 @@ class ProductProduct(models.Model):
 
     def _compute_bom_price(self, bom, boms_to_recompute=False):
         self.ensure_one()
+        if not bom:
+            return 0
         if not boms_to_recompute:
             boms_to_recompute = []
         total = 0