diff --git a/cmd/init.go b/cmd/init.go
index 36fa36eb5..dfbef58ba 100644
--- a/cmd/init.go
+++ b/cmd/init.go
@@ -23,7 +23,7 @@ var initCmdMode string
 // flags of build command
 var buildProjectCmdSrc string
 var buildProjectCmdTrg string
-var buildProjectCmdMtar string
+var buildProjectCmdMtar = "*"
 var buildProjectCmdPlatform string
 var buildProjectCmdStrict bool