diff --git a/osm-seed/values.yaml b/osm-seed/values.yaml
index 78e792eb..958ef53e 100644
--- a/osm-seed/values.yaml
+++ b/osm-seed/values.yaml
@@ -105,6 +105,7 @@ db:
   nodeSelector:
     enabled: false
   sharedMemorySize: 64Mi
+  # To use postgresqlConfig, you need to have already $PGDATA set up
   postgresqlConfig:
     enabled: false
     values: |