diff --git a/g/os/gcmd/gcmd_option.go b/g/os/gcmd/gcmd_option.go
index b3865d3fb..ca7b2caa1 100644
--- a/g/os/gcmd/gcmd_option.go
+++ b/g/os/gcmd/gcmd_option.go
@@ -28,5 +28,5 @@ func (c *gCmdOption) Get(key string, def...string) string {
 // GetVar returns the option value as *gvar.Var object specified by <key>,
 // if value does not exist, then returns <def> as its default value.
 func (c *gCmdOption) GetVar(key string, def...string) *gvar.Var {
-	return gvar.NewRead(c.Get(key, def...), true)
+	return gvar.New(c.Get(key, def...), true)
 }
diff --git a/g/os/gcmd/gcmd_value.go b/g/os/gcmd/gcmd_value.go
index 4792c7614..9f9b006b9 100644
--- a/g/os/gcmd/gcmd_value.go
+++ b/g/os/gcmd/gcmd_value.go
@@ -28,5 +28,5 @@ func (c *gCmdValue) Get(index int, def...string) string {
 // GetVar returns value by index <index> as *gvar.Var object,
 // if value does not exist, then returns <def> as its default value.
 func (c *gCmdValue) GetVar(index int, def...string) *gvar.Var {
-	return gvar.NewRead(c.Get(index, def...), true)
+	return gvar.New(c.Get(index, def...), true)
 }