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-rw-r--r--clang/lib/Edit/RewriteObjCFoundationAPI.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/lib/Edit/RewriteObjCFoundationAPI.cpp b/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
index 1fe6a2d68525..89dbc967d93e 100644
--- a/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
+++ b/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
@@ -18,6 +18,7 @@
#include "clang/AST/ParentMap.h"
#include "clang/Edit/Commit.h"
#include "clang/Lex/Lexer.h"
+#include <optional>
using namespace clang;
using namespace edit;