diff --git a/database/tables.sql b/database/tables.sql
index 3e6101eb8..06aaff1de 100644
--- a/database/tables.sql
+++ b/database/tables.sql
@@ -497,7 +497,7 @@ CREATE TABLE `ospos_receivings` (
   `receiving_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `supplier_id` int(10) DEFAULT NULL,
   `employee_id` int(10) NOT NULL DEFAULT '0',
-  `comment` text NOT NULL,
+  `comment` text DEFAULT NULL,
   `receiving_id` int(10) NOT NULL AUTO_INCREMENT,
   `payment_type` varchar(20) DEFAULT NULL,
   `reference` varchar(32) DEFAULT NULL,
@@ -549,7 +549,7 @@ CREATE TABLE `ospos_sales` (
   `sale_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `customer_id` int(10) DEFAULT NULL,
   `employee_id` int(10) NOT NULL DEFAULT '0',
-  `comment` text NOT NULL,
+  `comment` text DEFAULT NULL,
   `invoice_number` varchar(32) DEFAULT NULL,
   `quote_number` varchar(32) DEFAULT NULL,
   `sale_id` int(10) NOT NULL AUTO_INCREMENT,