diff --git a/clang/include/clang/Basic/Module.h b/clang/include/clang/Basic/Module.h
--- a/clang/include/clang/Basic/Module.h
+++ b/clang/include/clang/Basic/Module.h
@@ -93,7 +93,7 @@
 };
 
 /// Describes a module or submodule.
-class Module {
+class alignas(8) Module {
 public:
   /// The name of this module.
   std::string Name;