diff --git a/scagent/core/JsonRpc.go b/scagent/core/JsonRpc.go
index 2097d59..b1b91ed 100644
--- a/scagent/core/JsonRpc.go
+++ b/scagent/core/JsonRpc.go
@@ -124,8 +124,8 @@ func scanFileUnderPath(rootDir string, scope string, logger *zap.Logger, replay
 
 				//
 				if file.IsDir() {
-					fsize = "0"
-					hash = ""
+					fsize = "-"
+					hash = "-"
 				} else {
 					fsize = fmt.Sprintf("%d", fileinfo.Size())
 					hash = util.CalacHash(realpath)