diff --git a/core/contract/smart_contract.proto b/core/contract/smart_contract.proto
index 4f09e76e6..f53afa37b 100644
--- a/core/contract/smart_contract.proto
+++ b/core/contract/smart_contract.proto
@@ -17,6 +17,7 @@ message SmartContract {
         Function = 2;
         Event = 3;
         Fallback = 4;
+        Receive = 5;
       }
       message Param {
         bool indexed = 1;