diff --git a/core/Tron.proto b/core/Tron.proto
index 0d2b83df809..6554dd2e3da 100644
--- a/core/Tron.proto
+++ b/core/Tron.proto
@@ -50,6 +50,8 @@ message Account {
   map<string, int64> asset = 6;
   // the frozen balance
   repeated Frozen frozen = 7;
+  // bandwidth, get from frozen
+  int64 bandwidth = 8;
   // this account create time
   int64 create_time = 9;
   // this last opration time, including transfer, voting and so on.