diff --git a/include/gtest/internal/gtest-param-util-generated.h b/include/gtest/internal/gtest-param-util-generated.h
index e8054859..6dbaf4b7 100644
--- a/include/gtest/internal/gtest-param-util-generated.h
+++ b/include/gtest/internal/gtest-param-util-generated.h
@@ -40,7 +40,7 @@
 // and at most 10 arguments in Combine. Please contact
 // googletestframework@googlegroups.com if you need more.
 // Please note that the number of arguments to Combine is limited
-// by the maximum arity of the implementation of tr1::tuple which is
+// by the maximum arity of the implementation of tuple which is
 // currently set at 10.
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_GENERATED_H_
@@ -3157,9 +3157,9 @@ class ValueArray50 {
 //
 template <typename T1, typename T2>
 class CartesianProductGenerator2
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2> > {
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2> ParamType;
+  typedef ::testing::tuple<T1, T2> ParamType;
 
   CartesianProductGenerator2(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2)
@@ -3272,9 +3272,9 @@ class CartesianProductGenerator2
 
 template <typename T1, typename T2, typename T3>
 class CartesianProductGenerator3
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3> > {
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3> ParamType;
+  typedef ::testing::tuple<T1, T2, T3> ParamType;
 
   CartesianProductGenerator3(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3)
@@ -3404,9 +3404,9 @@ class CartesianProductGenerator3
 
 template <typename T1, typename T2, typename T3, typename T4>
 class CartesianProductGenerator4
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4> > {
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4> ParamType;
 
   CartesianProductGenerator4(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -3555,9 +3555,9 @@ class CartesianProductGenerator4
 
 template <typename T1, typename T2, typename T3, typename T4, typename T5>
 class CartesianProductGenerator5
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5> > {
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5> ParamType;
 
   CartesianProductGenerator5(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -3723,10 +3723,10 @@ class CartesianProductGenerator5
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6>
 class CartesianProductGenerator6
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5,
         T6> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6> ParamType;
 
   CartesianProductGenerator6(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -3909,10 +3909,10 @@ class CartesianProductGenerator6
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6, typename T7>
 class CartesianProductGenerator7
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5, T6,
         T7> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6, T7> ParamType;
 
   CartesianProductGenerator7(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -4112,10 +4112,10 @@ class CartesianProductGenerator7
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6, typename T7, typename T8>
 class CartesianProductGenerator8
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5, T6,
         T7, T8> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8> ParamType;
 
   CartesianProductGenerator8(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -4334,10 +4334,10 @@ class CartesianProductGenerator8
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6, typename T7, typename T8, typename T9>
 class CartesianProductGenerator9
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5, T6,
         T7, T8, T9> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9> ParamType;
 
   CartesianProductGenerator9(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -4573,10 +4573,10 @@ class CartesianProductGenerator9
 template <typename T1, typename T2, typename T3, typename T4, typename T5,
     typename T6, typename T7, typename T8, typename T9, typename T10>
 class CartesianProductGenerator10
-    : public ParamGeneratorInterface< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+    : public ParamGeneratorInterface< ::testing::tuple<T1, T2, T3, T4, T5, T6,
         T7, T8, T9, T10> > {
  public:
-  typedef ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> ParamType;
+  typedef ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> ParamType;
 
   CartesianProductGenerator10(const ParamGenerator<T1>& g1,
       const ParamGenerator<T2>& g2, const ParamGenerator<T3>& g3,
@@ -4838,8 +4838,8 @@ class CartesianProductHolder2 {
 CartesianProductHolder2(const Generator1& g1, const Generator2& g2)
       : g1_(g1), g2_(g2) {}
   template <typename T1, typename T2>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2> >(
         new CartesianProductGenerator2<T1, T2>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_)));
@@ -4860,8 +4860,8 @@ CartesianProductHolder3(const Generator1& g1, const Generator2& g2,
     const Generator3& g3)
       : g1_(g1), g2_(g2), g3_(g3) {}
   template <typename T1, typename T2, typename T3>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3> >(
         new CartesianProductGenerator3<T1, T2, T3>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -4885,8 +4885,8 @@ CartesianProductHolder4(const Generator1& g1, const Generator2& g2,
     const Generator3& g3, const Generator4& g4)
       : g1_(g1), g2_(g2), g3_(g3), g4_(g4) {}
   template <typename T1, typename T2, typename T3, typename T4>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4> >(
         new CartesianProductGenerator4<T1, T2, T3, T4>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -4912,8 +4912,8 @@ CartesianProductHolder5(const Generator1& g1, const Generator2& g2,
     const Generator3& g3, const Generator4& g4, const Generator5& g5)
       : g1_(g1), g2_(g2), g3_(g3), g4_(g4), g5_(g5) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5> >(
         new CartesianProductGenerator5<T1, T2, T3, T4, T5>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -4943,8 +4943,8 @@ CartesianProductHolder6(const Generator1& g1, const Generator2& g2,
       : g1_(g1), g2_(g2), g3_(g3), g4_(g4), g5_(g5), g6_(g6) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6> >(
         new CartesianProductGenerator6<T1, T2, T3, T4, T5, T6>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -4976,9 +4976,9 @@ CartesianProductHolder7(const Generator1& g1, const Generator2& g2,
       : g1_(g1), g2_(g2), g3_(g3), g4_(g4), g5_(g5), g6_(g6), g7_(g7) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6, typename T7>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6,
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6,
       T7> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7> >(
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7> >(
         new CartesianProductGenerator7<T1, T2, T3, T4, T5, T6, T7>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -5014,9 +5014,9 @@ CartesianProductHolder8(const Generator1& g1, const Generator2& g2,
           g8_(g8) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6, typename T7, typename T8>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7,
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7,
       T8> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8> >(
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8> >(
         new CartesianProductGenerator8<T1, T2, T3, T4, T5, T6, T7, T8>(
         static_cast<ParamGenerator<T1> >(g1_),
         static_cast<ParamGenerator<T2> >(g2_),
@@ -5055,9 +5055,9 @@ CartesianProductHolder9(const Generator1& g1, const Generator2& g2,
           g9_(g9) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6, typename T7, typename T8, typename T9>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
       T9> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
         T9> >(
         new CartesianProductGenerator9<T1, T2, T3, T4, T5, T6, T7, T8, T9>(
         static_cast<ParamGenerator<T1> >(g1_),
@@ -5099,10 +5099,10 @@ CartesianProductHolder10(const Generator1& g1, const Generator2& g2,
           g9_(g9), g10_(g10) {}
   template <typename T1, typename T2, typename T3, typename T4, typename T5,
       typename T6, typename T7, typename T8, typename T9, typename T10>
-  operator ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
-      T9, T10> >() const {
-    return ParamGenerator< ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8,
-        T9, T10> >(
+  operator ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9,
+      T10> >() const {
+    return ParamGenerator< ::testing::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9,
+        T10> >(
         new CartesianProductGenerator10<T1, T2, T3, T4, T5, T6, T7, T8, T9,
             T10>(
         static_cast<ParamGenerator<T1> >(g1_),
diff --git a/include/gtest/internal/gtest-param-util-generated.h.pump b/include/gtest/internal/gtest-param-util-generated.h.pump
index 009206fd..801a2fc7 100644
--- a/include/gtest/internal/gtest-param-util-generated.h.pump
+++ b/include/gtest/internal/gtest-param-util-generated.h.pump
@@ -39,7 +39,7 @@ $var maxtuple = 10  $$ Maximum number of Combine arguments we want to support.
 // and at most $maxtuple arguments in Combine. Please contact
 // googletestframework@googlegroups.com if you need more.
 // Please note that the number of arguments to Combine is limited
-// by the maximum arity of the implementation of tr1::tuple which is
+// by the maximum arity of the implementation of tuple which is
 // currently set at $maxtuple.
 
 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_GENERATED_H_
@@ -128,9 +128,9 @@ $range k 2..i
 
 template <$for j, [[typename T$j]]>
 class CartesianProductGenerator$i
-    : public ParamGeneratorInterface< ::std::tr1::tuple<$for j, [[T$j]]> > {
+    : public ParamGeneratorInterface< ::testing::tuple<$for j, [[T$j]]> > {
  public:
-  typedef ::std::tr1::tuple<$for j, [[T$j]]> ParamType;
+  typedef ::testing::tuple<$for j, [[T$j]]> ParamType;
 
   CartesianProductGenerator$i($for j, [[const ParamGenerator<T$j>& g$j]])
       : $for j, [[g$(j)_(g$j)]] {}
@@ -269,8 +269,8 @@ class CartesianProductHolder$i {
 CartesianProductHolder$i($for j, [[const Generator$j& g$j]])
       : $for j, [[g$(j)_(g$j)]] {}
   template <$for j, [[typename T$j]]>
-  operator ParamGenerator< ::std::tr1::tuple<$for j, [[T$j]]> >() const {
-    return ParamGenerator< ::std::tr1::tuple<$for j, [[T$j]]> >(
+  operator ParamGenerator< ::testing::tuple<$for j, [[T$j]]> >() const {
+    return ParamGenerator< ::testing::tuple<$for j, [[T$j]]> >(
         new CartesianProductGenerator$i<$for j, [[T$j]]>(
 $for j,[[
 
diff --git a/include/gtest/internal/gtest-port.h b/include/gtest/internal/gtest-port.h
index 7a734a27..7ac4a5d1 100644
--- a/include/gtest/internal/gtest-port.h
+++ b/include/gtest/internal/gtest-port.h
@@ -640,8 +640,18 @@ struct _RTL_CRITICAL_SECTION;
 
 // To avoid conditional compilation everywhere, we make it
 // gtest-port.h's responsibility to #include the header implementing
-// tr1/tuple.
+// tuple.
+// TODO(sbenza): Enable this block to start using std::tuple instead of
+//               std::tr1::tuple.
+#if 0 && GTEST_HAS_STD_TUPLE_
+# include <tuple>
+# define GTEST_TUPLE_NAMESPACE_ ::std
+#endif
+
 #if GTEST_HAS_TR1_TUPLE
+# ifndef GTEST_TUPLE_NAMESPACE_
+#  define GTEST_TUPLE_NAMESPACE_ ::std::tr1
+# endif  // GTEST_TUPLE_NAMESPACE_
 
 # if GTEST_USE_OWN_TR1_TUPLE
 #  include "gtest/internal/gtest-tuple.h"
@@ -952,6 +962,15 @@ namespace testing {
 
 class Message;
 
+// Import tuple and friends into the ::testing namespace.
+// It is part of our interface, having them in ::testing allows us to change
+// their types as needed.
+using GTEST_TUPLE_NAMESPACE_::get;
+using GTEST_TUPLE_NAMESPACE_::make_tuple;
+using GTEST_TUPLE_NAMESPACE_::tuple;
+using GTEST_TUPLE_NAMESPACE_::tuple_size;
+using GTEST_TUPLE_NAMESPACE_::tuple_element;
+
 namespace internal {
 
 // A secret type that Google Test users don't know about.  It has no
diff --git a/samples/sample8_unittest.cc b/samples/sample8_unittest.cc
index 5ad2e2c9..72743340 100644
--- a/samples/sample8_unittest.cc
+++ b/samples/sample8_unittest.cc
@@ -90,7 +90,7 @@ using ::testing::Combine;
 // PreCalculatedPrimeTable disabled. We do this by defining fixture which will
 // accept different combinations of parameters for instantiating a
 // HybridPrimeTable instance.
-class PrimeTableTest : public TestWithParam< ::std::tr1::tuple<bool, int> > {
+class PrimeTableTest : public TestWithParam< ::testing::tuple<bool, int> > {
  protected:
   virtual void SetUp() {
     // This can be written as
@@ -101,8 +101,8 @@ class PrimeTableTest : public TestWithParam< ::std::tr1::tuple<bool, int> > {
     //
     // once the Google C++ Style Guide allows use of ::std::tr1::tie.
     //
-    bool force_on_the_fly = ::std::tr1::get<0>(GetParam());
-    int max_precalculated = ::std::tr1::get<1>(GetParam());
+    bool force_on_the_fly = ::testing::get<0>(GetParam());
+    int max_precalculated = ::testing::get<1>(GetParam());
     table_ = new HybridPrimeTable(force_on_the_fly, max_precalculated);
   }
   virtual void TearDown() {
diff --git a/test/gtest-param-test_test.cc b/test/gtest-param-test_test.cc
index f60cb8a5..cc1dc65f 100644
--- a/test/gtest-param-test_test.cc
+++ b/test/gtest-param-test_test.cc
@@ -64,9 +64,9 @@ using ::testing::ValuesIn;
 
 # if GTEST_HAS_COMBINE
 using ::testing::Combine;
-using ::std::tr1::get;
-using ::std::tr1::make_tuple;
-using ::std::tr1::tuple;
+using ::testing::get;
+using ::testing::make_tuple;
+using ::testing::tuple;
 # endif  // GTEST_HAS_COMBINE
 
 using ::testing::internal::ParamGenerator;