1 files changed, 4 insertions, 2 deletions
diff --git a/clang/lib/Frontend/ModuleDependencyCollector.cpp b/clang/lib/Frontend/ModuleDependencyCollector.cpp
index 7e19ed3..785bff7 100644
--- a/clang/lib/Frontend/ModuleDependencyCollector.cpp
+++ b/clang/lib/Frontend/ModuleDependencyCollector.cpp
@@ -19,6 +19,7 @@
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
+#include <optional>
 
 using namespace clang;
 
@@ -48,8 +49,9 @@ struct ModuleDependencyPPCallbacks : public PPCallbacks {
   void InclusionDirective(SourceLocation HashLoc, const Token &IncludeTok,
                           StringRef FileName, bool IsAngled,
                           CharSourceRange FilenameRange,
-                          Optional<FileEntryRef> File, StringRef SearchPath,
-                          StringRef RelativePath, const Module *Imported,
+                          std::optional<FileEntryRef> File,
+                          StringRef SearchPath, StringRef RelativePath,
+                          const Module *Imported,
                           SrcMgr::CharacteristicKind FileType) override {
     if (!File)
       return;