diff --git a/postgres_exporter.go b/postgres_exporter.go
index 12ba8192..ec715409 100644
--- a/postgres_exporter.go
+++ b/postgres_exporter.go
@@ -30,6 +30,10 @@ var (
 		"web.telemetry-path", "/metrics",
 		"Path under which to expose metrics.",
 	)
+	queriesPath = flag.String(
+		"extend.query-path", "",
+		"Path to custom queries to run.",
+	)
 )
 
 // Metric name parts.