diff --git a/weed-fs/src/cmd/weed/master.go b/weed-fs/src/cmd/weed/master.go
index d514c0847..9ad99f128 100644
--- a/weed-fs/src/cmd/weed/master.go
+++ b/weed-fs/src/cmd/weed/master.go
@@ -36,7 +36,7 @@ var (
 	confFile          = cmdMaster.Flag.String("conf", "/etc/weedfs/weedfs.conf", "xml configuration file")
 	defaultRepType    = cmdMaster.Flag.String("defaultReplicationType", "000", "Default replication type if not specified.")
 	mReadTimeout      = cmdMaster.Flag.Int("readTimeout", 5, "connection read timeout in seconds")
-	mMaxCpu           = cmdVolume.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
+	mMaxCpu           = cmdMaster.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
 )
 
 var topo *topology.Topology
diff --git a/weed-fs/src/cmd/weed/version.go b/weed-fs/src/cmd/weed/version.go
index f2e92a7e4..aa2396b11 100644
--- a/weed-fs/src/cmd/weed/version.go
+++ b/weed-fs/src/cmd/weed/version.go
@@ -6,7 +6,7 @@ import (
 )
 
 const (
-	VERSION = "0.22"
+	VERSION = "0.23"
 )
 
 var cmdVersion = &Command{