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diff --git a/internal/ceres/collections_port.h b/internal/ceres/collections_port.h
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index a356cc0..c2fce90 100644
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--- a/internal/ceres/collections_port.h
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+++ b/internal/ceres/collections_port.h
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@@ -77,7 +77,7 @@ struct HashMap : std::tr1::unordered_map<K, V> {};
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struct HashSet : std::tr1::unordered_set<K> {};
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+#if defined(_WIN32) && !defined(__MINGW64__) && !defined(__MINGW32__)
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#define GG_LONGLONG(x) x##I64
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#define GG_ULONGLONG(x) x##UI64