diff --git a/database/upgrades/2020-08-25-message-id-column.go b/database/upgrades/2020-08-25-message-id-column.go
index a74f824..00a862c 100644
--- a/database/upgrades/2020-08-25-message-id-column.go
+++ b/database/upgrades/2020-08-25-message-id-column.go
@@ -6,7 +6,7 @@ import (
 
 func init() {
 	upgrades[17] = upgrade{"Add id column to messages", func(tx *sql.Tx, ctx context) error {
-		_, err := tx.Exec(`ALTER TABLE message ADD COLUMN id CHAR(13) DEFAULT ""`)
+		_, err := tx.Exec(`ALTER TABLE message ADD COLUMN id CHAR(13) DEFAULT ''`)
 		if err != nil {
 			return err
 		}