diff --git a/googletest/include/gtest/internal/gtest-port.h b/googletest/include/gtest/internal/gtest-port.h
index f6cd3c03..7e008c05 100644
--- a/googletest/include/gtest/internal/gtest-port.h
+++ b/googletest/include/gtest/internal/gtest-port.h
@@ -2241,6 +2241,12 @@ template <bool bool_value> const bool bool_constant<bool_value>::value;
 typedef bool_constant<false> false_type;
 typedef bool_constant<true> true_type;
 
+template <typename T, typename U>
+struct is_same : public false_type {};
+
+template <typename T>
+struct is_same<T, T> : public true_type {};
+
 template <typename T>
 struct is_pointer : public false_type {};