diff --git a/compiler/cpp/src/generate/t_py_generator.cc b/compiler/cpp/src/generate/t_py_generator.cc
index 0218394..f0f076b 100644
--- a/compiler/cpp/src/generate/t_py_generator.cc
+++ b/compiler/cpp/src/generate/t_py_generator.cc
@@ -850,19 +850,21 @@
  * @param tfunction The function
  */
 void t_py_generator::generate_py_function_helpers(t_function* tfunction) {
-  t_struct result(program_, tfunction->get_name() + "_result");
-  t_field success(tfunction->get_returntype(), "success", 0);
-  if (!tfunction->get_returntype()->is_void()) {
-    result.append(&success);
-  }
+  if (!tfunction->is_async()) {
+    t_struct result(program_, tfunction->get_name() + "_result");
+    t_field success(tfunction->get_returntype(), "success", 0);
+    if (!tfunction->get_returntype()->is_void()) {
+      result.append(&success);
+    }
 
-  t_struct* xs = tfunction->get_xceptions();
-  const vector<t_field*>& fields = xs->get_members();
-  vector<t_field*>::const_iterator f_iter;
-  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
-    result.append(*f_iter);
+    t_struct* xs = tfunction->get_xceptions();
+    const vector<t_field*>& fields = xs->get_members();
+    vector<t_field*>::const_iterator f_iter;
+    for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
+      result.append(*f_iter);
+    }
+    generate_py_struct_definition(f_service_, &result, false, true);
   }
-  generate_py_struct_definition(f_service_, &result, false, true);
 }
 
 /**