diff --git a/code/MSSQLDatabase.php b/code/MSSQLDatabase.php
index e2acff5..867357e 100644
--- a/code/MSSQLDatabase.php
+++ b/code/MSSQLDatabase.php
@@ -315,7 +315,7 @@ class MSSQLDatabase extends Database {
 	 * This is a private MSSQL-only function which returns specific details about a column's constraints (if any)
 	 */
 	private function ColumnConstraints($tableName, $columnName){
-		$constraint=$this->query("SELECT CC.CONSTRAINT_NAME, CHECK_CLAUSE, COLUMN_NAME FROM INFORMATION_SCHEMA.CHECK_CONSTRAINTS AS CC INNER JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE AS CCU ON CCU.CONSTRAINT_NAME=CC.CONSTRAINT_NAME WHERE TABLE_NAME='$tableName' AND COLUMN_NAME='" . $columnName . "';")->first();
+		$constraint=$this->query("SELECT CC.CONSTRAINT_NAME, CAST(CHECK_CLAUSE AS TEXT) AS CHECK_CLAUSE, COLUMN_NAME FROM INFORMATION_SCHEMA.CHECK_CONSTRAINTS AS CC INNER JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE AS CCU ON CCU.CONSTRAINT_NAME=CC.CONSTRAINT_NAME WHERE TABLE_NAME='$tableName' AND COLUMN_NAME='" . $columnName . "';")->first();
 		
 		return $constraint;
 	}