diff --git a/smart-contracts/contracts/NilAwaitable.sol b/smart-contracts/contracts/NilAwaitable.sol
index e97761987..3b426cd3c 100644
--- a/smart-contracts/contracts/NilAwaitable.sol
+++ b/smart-contracts/contracts/NilAwaitable.sol
@@ -10,7 +10,6 @@ contract NilAwaitable is NilBase {
 
     struct Awaiter {
         function(bool, bytes memory, bytes memory) internal callback;
-        uint answer_id;
         bool active;
         bytes context;
     }
@@ -63,7 +62,7 @@ contract NilAwaitable is NilBase {
         function(bool, bytes memory, bytes memory) internal cb
     ) internal {
         ctrl.await_id += 1;
-        ctrl.awaiters[ctrl.await_id] = Awaiter({callback: cb, answer_id: ctrl.await_id, active: true, context: context});
+        ctrl.awaiters[ctrl.await_id] = Awaiter({callback: cb, active: true, context: context});
         __Precompile__(address(Nil.ASYNC_CALL)).precompileAsyncCall{value: value}(false, Nil.FORWARD_REMAINING, dst, zeroAddress,
             zeroAddress, 0, tokens, callData, ctrl.await_id, responseProcessingGas);
     }