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-rw-r--r--lib/Support/DeltaAlgorithm.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Support/DeltaAlgorithm.cpp b/lib/Support/DeltaAlgorithm.cpp
index 9e52874de8326..50ea4e9ce0c61 100644
--- a/lib/Support/DeltaAlgorithm.cpp
+++ b/lib/Support/DeltaAlgorithm.cpp
@@ -9,6 +9,7 @@
#include "llvm/ADT/DeltaAlgorithm.h"
#include <algorithm>
#include <iterator>
+#include <set>
using namespace llvm;
DeltaAlgorithm::~DeltaAlgorithm() {