diff --git a/weed/command/master_follower.go b/weed/command/master_follower.go
index 4e0983eb96..95c065775e 100644
--- a/weed/command/master_follower.go
+++ b/weed/command/master_follower.go
@@ -47,6 +47,7 @@ func init() {
 	mf.metricsIntervalSec = aws.Int(0)
 	mf.raftResumeState = aws.Bool(false)
 	mf.maxParallelVacuumPerServer = aws.Int(1)
+	mf.maxWritableVolumes = aws.Int(0)
 	mf.vacuumIntervalSeconds = aws.Int(840)
 	mf.vacuumDeleteEmptyAfterSeconds = aws.Int(0)
 	mf.telemetryUrl = aws.String("https://telemetry.seaweedfs.com/api/collect")