diff --git a/clang/lib/Sema/HLSLExternalSemaSource.cpp b/clang/lib/Sema/HLSLExternalSemaSource.cpp
index 79fc2751b7381..4368e8cad6df0 100644
--- a/clang/lib/Sema/HLSLExternalSemaSource.cpp
+++ b/clang/lib/Sema/HLSLExternalSemaSource.cpp
@@ -546,6 +546,10 @@ struct BuiltinTypeMethodBuilder {
 public:
   ~BuiltinTypeMethodBuilder() { finalizeMethod(); }
 
+  BuiltinTypeMethodBuilder(const BuiltinTypeMethodBuilder &Other) = delete;
+  BuiltinTypeMethodBuilder &
+  operator=(const BuiltinTypeMethodBuilder &Other) = delete;
+
   Expr *getResourceHandleExpr() {
     // The first statement added to a method or access to 'this' creates the
     // declaration.