diff --git a/dsolovianov/postgresql/DDL.sql b/dsolovianov/postgresql/DDL.sql
index a578b7b..0c7c3b1 100644
--- a/dsolovianov/postgresql/DDL.sql
+++ b/dsolovianov/postgresql/DDL.sql
@@ -30,7 +30,7 @@ CREATE TABLE dsolovianov.order_items (
     product_id         INT NOT NULL,
     quantity           INT NOT NULL CHECK (quantity > 0),
     price_at_purchase  DECIMAL(10,2) NOT NULL CHECK (price_at_purchase > 0),
-    CONSTRAINT order_items_pk PRIMARY KEY (order_id, product_id)
+    CONSTRAINT order_items_pk PRIMARY KEY (order_id, product_id),
     CONSTRAINT order_items_order_fk
     	FOREIGN KEY (order_id) REFERENCES dsolovianov.orders(id),
     CONSTRAINT order_items_product_fk