diff --git a/vlib/pg/pg.v b/vlib/pg/pg.v
index d8a68b8b58..acfe55fdc8 100644
--- a/vlib/pg/pg.v
+++ b/vlib/pg/pg.v
@@ -103,14 +103,14 @@ pub fn (db DB) exec(query string) []pg.Row {
 	return res_to_rows(res)
 }
 
-fn rows_first_or_empty(rows []pg.Row) pg.Row? {
+fn rows_first_or_empty(rows []pg.Row) ?pg.Row {
 	if rows.len == 0 {
 		return error('no row')
 	} 
 	return rows[0]
 }
             
-pub fn (db DB) exec_one(query string) pg.Row? {
+pub fn (db DB) exec_one(query string) ?pg.Row {
 	res := C.PQexec(db.conn, query.str)
 	e := string(C.PQerrorMessage(db.conn))
 	if e != '' {