diff --git a/loaf_billing.sql b/loaf_billing.sql
index e28e689..c45a5f6 100644
--- a/loaf_billing.sql
+++ b/loaf_billing.sql
@@ -2,7 +2,7 @@
 
 CREATE TABLE IF NOT EXISTS `loaf_invoices` (
     `id` VARCHAR(15), -- unique bill id
-    `issued` DATE DEFAULT CURRENT_DATE, -- the date the bill was issued
+    `issued` DATE DEFAULT (CURRENT_DATE), -- the date the bill was issued
 
     `biller` VARCHAR(150) NOT NULL, -- the identifier who issued the bill
     `biller_name` VARCHAR(150) NOT NULL, -- the name of the person who issued the bill
@@ -25,4 +25,4 @@ CREATE TABLE IF NOT EXISTS `loaf_invoices` (
     `signature` LONGTEXT, -- image data (url/base64) for the signature
 
     PRIMARY KEY (`id`)
-);
\ No newline at end of file
+);