diff --git a/db/zm_create.sql.in b/db/zm_create.sql.in
index d084cda2a..79eca0056 100644
--- a/db/zm_create.sql.in
+++ b/db/zm_create.sql.in
@@ -841,7 +841,7 @@ CREATE TABLE `Storage` (
 	`Path`	varchar(64)	NOT NULL default '',
 	`Name`	varchar(64) NOT NULL default '',
 	`Type`	enum('local','s3fs') NOT NULL default 'local',
-  `DiskSpace`   bigint unsigned default NULL,
+  `DiskSpace`   bigint default NULL,
   `Scheme`   enum('Deep','Medium','Shallow') NOT NULL default 'Medium',
   `ServerId` int(10) unsigned,
 	PRIMARY KEY (`Id`)