diff --git a/misc/db_schema.yaml b/misc/db_schema.yaml
index c9dafe879c..c62d794308 100644
--- a/misc/db_schema.yaml
+++ b/misc/db_schema.yaml
@@ -1484,7 +1484,7 @@ stp:
     - { Field: topChanges, Type: mediumint(9), 'Null': false, Extra: '' }
     - { Field: designatedRoot, Type: varchar(32), 'Null': false, Extra: '' }
     - { Field: rootCost, Type: mediumint(9), 'Null': false, Extra: '' }
-    - { Field: rootPort, Type: mediumint(9), 'Null': false, Extra: '' }
+    - { Field: rootPort, Type: int(11), 'Null': true, Extra: '' }
     - { Field: maxAge, Type: mediumint(9), 'Null': false, Extra: '' }
     - { Field: helloTime, Type: mediumint(9), 'Null': false, Extra: '' }
     - { Field: holdTime, Type: mediumint(9), 'Null': false, Extra: '' }
diff --git a/sql-schema/246.sql b/sql-schema/246.sql
new file mode 100644
index 0000000000..e8e28e6d4f
--- /dev/null
+++ b/sql-schema/246.sql
@@ -0,0 +1 @@
+ALTER TABLE `stp` MODIFY `rootPort` int(11);