diff --git a/sys/xtract.go b/sys/xtract.go
index 54ccd78..dd76da4 100644
--- a/sys/xtract.go
+++ b/sys/xtract.go
@@ -26,7 +26,7 @@ func NewXtract(dir string, outFile string) *Xtract {
 	return &Xtract{dir: dir, outFile: outFile, withBar: false}
 }
 
-func (x *Xtract) addBar(bar *io.Writer) {
+func (x *Xtract) AddBar(bar *io.Writer) {
 	x.bar = bar
 	x.withBar = true
 }