diff --git a/kubernetes/main/apps/database/postgresql/cluster/cluster16.yaml b/kubernetes/main/apps/database/postgresql/cluster/cluster16.yaml
index 819073ff..df072ffa 100644
--- a/kubernetes/main/apps/database/postgresql/cluster/cluster16.yaml
+++ b/kubernetes/main/apps/database/postgresql/cluster/cluster16.yaml
@@ -21,6 +21,7 @@ spec:
     parameters:
       max_connections: "400"
       shared_buffers: 256MB
+    enableAlterSystem: true # must be set to true to enable pgvecto.rs
   nodeMaintenanceWindow:
     inProgress: false
     reusePVC: true