diff --git a/compiler/cpp/src/generate/t_swift_generator.cc b/compiler/cpp/src/generate/t_swift_generator.cc
index e9e8cc9..6e48bca 100644
--- a/compiler/cpp/src/generate/t_swift_generator.cc
+++ b/compiler/cpp/src/generate/t_swift_generator.cc
@@ -448,7 +448,7 @@
   
   string visibility = is_private ? "private" : "public";
   
-  out << indent() << visibility << " struct " << tstruct->get_name();
+  out << indent() << visibility << " final class " << tstruct->get_name();
 
   if (tstruct->is_xception()) {
     out << " : ErrorType";