diff --git a/session/database.rst b/session/database.rst
index 29cd29f8d30..30c6410275a 100644
--- a/session/database.rst
+++ b/session/database.rst
@@ -389,7 +389,7 @@ MySQL
     CREATE TABLE `sessions` (
         `sess_id` VARBINARY(128) NOT NULL PRIMARY KEY,
         `sess_data` BLOB NOT NULL,
-        `sess_lifetime` MEDIUMINT NOT NULL,
+        `sess_lifetime` INTEGER UNSIGNED NOT NULL,
         `sess_time` INTEGER UNSIGNED NOT NULL
     ) COLLATE utf8mb4_bin, ENGINE = InnoDB;