diff --git a/adminer/drivers/mssql.inc.php b/adminer/drivers/mssql.inc.php
index 4a44386f..2529e839 100644
--- a/adminer/drivers/mssql.inc.php
+++ b/adminer/drivers/mssql.inc.php
@@ -678,7 +678,7 @@ WHERE sys1.xtype = 'TR' AND sys2.name = " . q($table)
 	}
 
 	function support($feature) {
-		return preg_match('~^(comment|columns|database|drop_col|indexes|descidx|scheme|sql|table|trigger|view|view_trigger)$~', $feature); //! routine|
+		return preg_match('~^(check|comment|columns|database|drop_col|indexes|descidx|scheme|sql|table|trigger|view|view_trigger)$~', $feature); //! routine|
 	}
 
 	function driver_config() {
diff --git a/adminer/include/editing.inc.php b/adminer/include/editing.inc.php
index 27c182b9..5c699950 100644
--- a/adminer/include/editing.inc.php
+++ b/adminer/include/editing.inc.php
@@ -539,8 +539,8 @@ function create_routine($routine, $row) {
 function check_constraints($table) {
 	// MariaDB contains CHECK_CONSTRAINTS.TABLE_NAME, MySQL and PostrgreSQL not
 	return get_key_vals("SELECT c.CONSTRAINT_NAME, CHECK_CLAUSE
-FROM information_schema.CHECK_CONSTRAINTS c
-JOIN information_schema.TABLE_CONSTRAINTS t ON c.CONSTRAINT_SCHEMA = t.CONSTRAINT_SCHEMA AND c.CONSTRAINT_NAME = t.CONSTRAINT_NAME
+FROM INFORMATION_SCHEMA.CHECK_CONSTRAINTS c
+JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t ON c.CONSTRAINT_SCHEMA = t.CONSTRAINT_SCHEMA AND c.CONSTRAINT_NAME = t.CONSTRAINT_NAME
 WHERE c.CONSTRAINT_SCHEMA = " . q($_GET["ns"] != "" ? $_GET["ns"] : DB) . "
 AND t.TABLE_NAME = " . q($table) . "
 AND CHECK_CLAUSE NOT LIKE '% IS NOT NULL'"); // ignore default IS NOT NULL checks in PostrgreSQL
diff --git a/changes.txt b/changes.txt
index ded6505f..71e2dfb8 100644
--- a/changes.txt
+++ b/changes.txt
@@ -1,6 +1,6 @@
 Adminer 4.17.0-dev:
 Hide index column options by default
-MySQL, PostgreSQL: Support CHECK constraint
+MySQL, PostgreSQL, MS SQL: Support CHECK constraint
 PostgreSQL: Link user defined types
 PostgreSQL: Constraint enum values in editing (bug #270)
 SQLite: Show all supported pragmas in Variables