diff --git a/doctrine/pdo_session_storage.rst b/doctrine/pdo_session_storage.rst
index 42166ca5d19..6860511d59f 100644
--- a/doctrine/pdo_session_storage.rst
+++ b/doctrine/pdo_session_storage.rst
@@ -246,7 +246,7 @@ MySQL
     CREATE TABLE `sessions` (
         `sess_id` VARCHAR(128) NOT NULL PRIMARY KEY,
         `sess_data` BLOB NOT NULL,
-        `sess_time` INTEGER UNSIGNED NOT NULL,
+        `sess_time` INTEGER NOT NULL,
         `sess_lifetime` MEDIUMINT NOT NULL
     ) COLLATE utf8_bin, ENGINE = InnoDB;