diff --git a/clang/lib/AST/Interp/ByteCodeExprGen.cpp b/clang/lib/AST/Interp/ByteCodeExprGen.cpp
index 9f79a7bcf9d34..ee59fc372a8b5 100644
--- a/clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ b/clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -40,7 +40,7 @@ template <class Emitter> class DeclScope final : public VariableScope<Emitter> {
 };
 
 /// Scope used to handle initialization methods.
-template <class Emitter> class OptionScope {
+template <class Emitter> class OptionScope final {
 public:
   /// Root constructor, compiling or discarding primitives.
   OptionScope(ByteCodeExprGen<Emitter> *Ctx, bool NewDiscardResult)