1 files changed, 3 insertions, 3 deletions
diff --git a/clang/lib/AST/ExternalASTSource.cpp b/clang/lib/AST/ExternalASTSource.cpp
index 257833182621..090ef02aa422 100644
--- a/clang/lib/AST/ExternalASTSource.cpp
+++ b/clang/lib/AST/ExternalASTSource.cpp
@@ -20,9 +20,9 @@
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/Module.h"
 #include "clang/Basic/SourceManager.h"
-#include "llvm/ADT/None.h"
 #include "llvm/Support/ErrorHandling.h"
 #include <cstdint>
+#include <optional>
 
 using namespace clang;
 
@@ -30,9 +30,9 @@ char ExternalASTSource::ID;
 
 ExternalASTSource::~ExternalASTSource() = default;
 
-llvm::Optional<ASTSourceDescriptor>
+std::optional<ASTSourceDescriptor>
 ExternalASTSource::getSourceDescriptor(unsigned ID) {
-  return None;
+  return std::nullopt;
 }
 
 ExternalASTSource::ExtKind