diff --git a/weed/shell/command_ec_balance.go b/weed/shell/command_ec_balance.go
index f3f4fff45..6d44a184b 100644
--- a/weed/shell/command_ec_balance.go
+++ b/weed/shell/command_ec_balance.go
@@ -26,7 +26,7 @@ func (c *commandEcBalance) Name() string {
 func (c *commandEcBalance) Help() string {
 	return `balance all ec shards among volume servers
 
-	ec.balance [-c EACH_COLLECTION|<collection_name>] [-f] [-dataCenter <data_center>]
+	ec.balance [-c EACH_COLLECTION|<collection_name>] [-force] [-dataCenter <data_center>]
 
 	Algorithm:
 
diff --git a/weed/shell/command_ec_rebuild.go b/weed/shell/command_ec_rebuild.go
index 660267b22..4b82f96c0 100644
--- a/weed/shell/command_ec_rebuild.go
+++ b/weed/shell/command_ec_rebuild.go
@@ -27,7 +27,7 @@ func (c *commandEcRebuild) Name() string {
 func (c *commandEcRebuild) Help() string {
 	return `find and rebuild missing ec shards among volume servers
 
-	ec.rebuild [-c EACH_COLLECTION|<collection_name>] [-f]
+	ec.rebuild [-c EACH_COLLECTION|<collection_name>] [-force]
 
 	Algorithm:
 
diff --git a/weed/shell/command_volume_balance.go b/weed/shell/command_volume_balance.go
index 9108fccaa..683e2dbe8 100644
--- a/weed/shell/command_volume_balance.go
+++ b/weed/shell/command_volume_balance.go
@@ -28,7 +28,7 @@ func (c *commandVolumeBalance) Name() string {
 func (c *commandVolumeBalance) Help() string {
 	return `balance all volumes among volume servers
 
-	volume.balance [-c ALL|EACH_COLLECTION|<collection_name>] [-f] [-dataCenter=<data_center_name>]
+	volume.balance [-c ALL|EACH_COLLECTION|<collection_name>] [-force] [-dataCenter=<data_center_name>]
 
 	Algorithm: