diff --git a/core/Tron.proto b/core/Tron.proto
index a8b986f0471..e061f01602d 100644
--- a/core/Tron.proto
+++ b/core/Tron.proto
@@ -104,6 +104,7 @@ message Transaction {
       DeployContract = 7;
       WitnessUpdateContract = 8;
       ParticipateAssetIssueContract = 9;
+      AccountUpdateContract = 10;
       CustomContract = 20;
     }
     ContractType type = 1;