diff --git a/plugins/voyage/examples/observability/README.md b/plugins/voyage/examples/observability/README.md
index a83e27b..af51f83 100644
--- a/plugins/voyage/examples/observability/README.md
+++ b/plugins/voyage/examples/observability/README.md
@@ -41,7 +41,8 @@ export VOYAGE_TEXTFILE_DIR="$(pwd)/voyage-textfile"
 
 # Path B — OTLP mode
 export VOYAGE_EXPORT_MODE=otlp
-export VOYAGE_OTLP_ENDPOINT=http://localhost:4318/v1/metrics
+export VOYAGE_OTEL_ENDPOINT=http://localhost:4318/v1/metrics
+export VOYAGE_OTEL_ALLOW_PRIVATE=1   # required: localhost is loopback (RFC1122)
 ```
 
 The Stop hook (wired in `hooks/hooks.json`) will run