diff --git a/framework/db/mssql/QueryBuilder.php b/framework/db/mssql/QueryBuilder.php
index b964513..a846026 100644
--- a/framework/db/mssql/QueryBuilder.php
+++ b/framework/db/mssql/QueryBuilder.php
@@ -190,7 +190,7 @@ class QueryBuilder extends \yii\db\QueryBuilder
                     "DF_{$constraintBase}",
                     $table,
                     $column,
-                    $defaultValue instanceof Expression ?  $defaultValue : new Expression($defaultValue)
+                    $defaultValue instanceof Expression ? $defaultValue : new Expression($defaultValue)
                 );
             }