diff --git a/pkg/trace/trace.go b/pkg/trace/trace.go
index 9144d61b614fdf1d42ca76464b90524c166bfc19..92df11ab009e5bf879376bddfe2e14341edcd62c 100644
--- a/pkg/trace/trace.go
+++ b/pkg/trace/trace.go
@@ -49,7 +49,7 @@ func getTracer(t string) (minikubeTracer, error) {
 	case "":
 		return nil, nil
 	}
-	return nil, fmt.Errorf("%s is not a valid tracer", t)
+	return nil, fmt.Errorf("%s is not a valid tracer, valid tracers include: [gcp]", t)
 }
 
 // StartSpan starts a span with the given name
diff --git a/site/content/en/docs/commands/start.md b/site/content/en/docs/commands/start.md
index 1c206140bfd9b0a86af119a6a830c99a96d7bbe9..b770c4745b8f66c214de976c4ca5df30ff2461ba 100644
--- a/site/content/en/docs/commands/start.md
+++ b/site/content/en/docs/commands/start.md
@@ -87,6 +87,7 @@ minikube start [flags]
       --preload                           If set, download tarball of preloaded images if available to improve start time. Defaults to true. (default true)
       --registry-mirror strings           Registry mirrors to pass to the Docker daemon
       --service-cluster-ip-range string   The CIDR to be used for service cluster IPs. (default "10.96.0.0/12")
+      --trace string                      Send trace events. Options include: [gcp]
       --uuid string                       Provide VM UUID to restore MAC address (hyperkit driver only)
       --vm                                Filter to use only VM Drivers
       --vm-driver driver                  DEPRECATED, use driver instead.