diff --git a/ext/pdo_dblib/dblib_driver.c b/ext/pdo_dblib/dblib_driver.c
index 77832f95204..baf1dcc670f 100644
--- a/ext/pdo_dblib/dblib_driver.c
+++ b/ext/pdo_dblib/dblib_driver.c
@@ -315,7 +315,7 @@ static int pdo_dblib_handle_factory(pdo_dbh_t *dbh, zval *driver_options TSRMLS_
 	DBSETOPT(H->link, DBTEXTSIZE, "2147483647");
 
 	/* allow double quoted indentifiers */
-	DBSETOPT(H->link, DBQUOTEDIDENT, 1);
+	DBSETOPT(H->link, DBQUOTEDIDENT, NULL);
 
 	if (vars[3].optval && FAIL == dbuse(H->link, vars[3].optval)) {
 		goto cleanup;