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-rw-r--r--lib/Basic/Diagnostic.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Basic/Diagnostic.cpp b/lib/Basic/Diagnostic.cpp
index cfc07b8b4e..60feb75c1c 100644
--- a/lib/Basic/Diagnostic.cpp
+++ b/lib/Basic/Diagnostic.cpp
@@ -17,6 +17,7 @@
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/CrashRecoveryContext.h"
+#include <cctype>
using namespace clang;