diff --git a/core/Tron.proto b/core/Tron.proto
index 87a0b6ca70b..10cbcbfa0c5 100644
--- a/core/Tron.proto
+++ b/core/Tron.proto
@@ -82,6 +82,7 @@ message Transaction {
       DeployContract = 7;
       WitnessUpdateContract = 8;
       ParticipateAssetIssueContract = 9;
+      AccountUpdateContract = 10;
     }
     ContractType type = 1;
     google.protobuf.Any parameter = 2;