diff --git a/SQL/mysql.initial.sql b/SQL/mysql.initial.sql
index 5b9047a1b..f3b81029c 100644
--- a/SQL/mysql.initial.sql
+++ b/SQL/mysql.initial.sql
@@ -202,7 +202,7 @@ CREATE TABLE `searches` (
 
 CREATE TABLE `filestore` (
  `file_id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
- `user_id` int(10) NOT NULL,
+ `user_id` int(10) UNSIGNED NOT NULL,
  `filename` varchar(128) NOT NULL,
  `mtime` int(10) NOT NULL,
  `data` longtext NOT NULL,
diff --git a/SQL/mysql/2018021600.sql b/SQL/mysql/2018021600.sql
index 7337f73ed..10098511c 100644
--- a/SQL/mysql/2018021600.sql
+++ b/SQL/mysql/2018021600.sql
@@ -1,6 +1,6 @@
 CREATE TABLE `filestore` (
     `file_id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
-    `user_id` int(10) NOT NULL,
+    `user_id` int(10) UNSIGNED NOT NULL,
     `filename` varchar(128) NOT NULL,
     `mtime` int(10) NOT NULL,
     `data` longtext NOT NULL,