diff --git a/programs/js_operation_serializer/main.cpp b/programs/js_operation_serializer/main.cpp
index 3852cf04..8d81db24 100644
--- a/programs/js_operation_serializer/main.cpp
+++ b/programs/js_operation_serializer/main.cpp
@@ -375,7 +375,7 @@ int main( int argc, char** argv )
     detail_ns::js_name<fee_parameters>::name("fee_parameters");
     detail_ns::js_name<operation>::name("operation");
     detail_ns::js_name<operation_result>::name("operation_result");
-    detail_ns::js_name<operation_extensions>::name("future_extensions");
+    detail_ns::js_name<future_extensions>::name("future_extensions");
     detail_ns::js_name<worker_initializer>::name("worker_initializer");
     detail_ns::js_name<predicate>::name("predicate");
     detail_ns::js_name<vesting_policy_initializer>::name("vesting_policy_initializer");