diff --git a/sql/vector--0.3.2--0.4.0.sql b/sql/vector--0.3.2--0.4.0.sql
index b5bf416..e095e4e 100644
--- a/sql/vector--0.3.2--0.4.0.sql
+++ b/sql/vector--0.3.2--0.4.0.sql
@@ -1,4 +1,5 @@
 -- complain if script is sourced in psql, rather than via CREATE EXTENSION
 \echo Use "ALTER EXTENSION vector UPDATE TO '0.4.0'" to load this file. \quit
 
-ALTER TYPE vector SET (STORAGE = extended);
+-- requires Postgres 13+
+-- ALTER TYPE vector SET (STORAGE = extended);