diff --git a/cmd/postgres_exporter/postgres_exporter.go b/cmd/postgres_exporter/postgres_exporter.go
index 1968b006..282bb906 100644
--- a/cmd/postgres_exporter/postgres_exporter.go
+++ b/cmd/postgres_exporter/postgres_exporter.go
@@ -914,6 +914,7 @@ func DisableSettingsMetrics(b bool) ExporterOpt {
 	}
 }
 
+// AutoDiscoverDatabases allows scraping all databases on a database server.
 func AutoDiscoverDatabases(b bool) ExporterOpt {
 	return func(e *Exporter) {
 		e.autoDiscoverDatabases = b