--- a/sqlsrv/schema.inc	Sat Feb 23 12:44:38 2013
+++ b/sqlsrv/schema.inc	Sat Apr 27 11:21:46 2013
@@ -174 +174 @@
-        $sql .= ' CHECK (' . $name . ' >= 0)';
+        $sql .= ' CHECK (' . $this->connection->quoteIdentifier($name) . ' >= 0)';