diff --git a/compiler/cpp/src/thrift/generate/t_json_generator.cc b/compiler/cpp/src/thrift/generate/t_json_generator.cc
index eb4ef79..e16bc50 100644
--- a/compiler/cpp/src/thrift/generate/t_json_generator.cc
+++ b/compiler/cpp/src/thrift/generate/t_json_generator.cc
@@ -370,6 +370,7 @@
     vector<t_program*>::const_iterator inc_it;
     for (inc_it = includes.begin(); inc_it != includes.end(); ++inc_it) {
       write_comma_if_needed();
+      f_json_ << indent();
       write_string((*inc_it)->get_name());
       indicate_comma_needed();
     }