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-rw-r--r--clang/unittests/Driver/SanitizerArgsTest.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/unittests/Driver/SanitizerArgsTest.cpp b/clang/unittests/Driver/SanitizerArgsTest.cpp
index 8eecd53ef40c..e9252ff2e580 100644
--- a/clang/unittests/Driver/SanitizerArgsTest.cpp
+++ b/clang/unittests/Driver/SanitizerArgsTest.cpp
@@ -27,6 +27,7 @@
#include "gtest/gtest.h"
#include <cstdlib>
#include <memory>
+#include <optional>
#include <string>
using namespace clang;
using namespace clang::driver;