diff --git a/utils/src/b_json/b_json_entity_ext_manage.cpp b/utils/src/b_json/b_json_entity_ext_manage.cpp
index 9d5ccca909e1a145c0e2be87681b088fc84ff51c..758d2721e896c6a78b89f70f6e419c4cefaf1b16 100644
--- a/utils/src/b_json/b_json_entity_ext_manage.cpp
+++ b/utils/src/b_json/b_json_entity_ext_manage.cpp
@@ -31,11 +31,11 @@ Json::Value Stat2JsonValue(struct stat sta)
 {
     Json::Value value;
 
-    value["st_size"] = static_cast<uint64_t>(sta.st_size);
-    value["st_atim"]["tv_sec"] = static_cast<uint64_t>(sta.st_atim.tv_sec);
-    value["st_atim"]["tv_nsec"] = static_cast<uint64_t>(sta.st_atim.tv_nsec);
-    value["st_mtim"]["tv_sec"] = static_cast<uint64_t>(sta.st_mtim.tv_sec);
-    value["st_mtim"]["tv_nsec"] = static_cast<uint64_t>(sta.st_mtim.tv_nsec);
+    value["st_size"] = static_cast<int64_t>(sta.st_size);
+    value["st_atim"]["tv_sec"] = static_cast<int64_t>(sta.st_atim.tv_sec);
+    value["st_atim"]["tv_nsec"] = static_cast<int64_t>(sta.st_atim.tv_nsec);
+    value["st_mtim"]["tv_sec"] = static_cast<int64_t>(sta.st_mtim.tv_sec);
+    value["st_mtim"]["tv_nsec"] = static_cast<int64_t>(sta.st_mtim.tv_nsec);
 
     return value;
 }