diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 6289a2c113f..f51b81a5dab 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,12 @@
 2017-12-01  Jonathan Wakely  <jwakely@redhat.com>
 
+	Backport from mainline
+	2017-12-01  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/std/type_traits (integral_constant): Make member functions
+	noexcept (LWG 2346).
+	* include/std/utility (integer_sequence): Likewise.
+
 	Backport from mainline
 	2017-11-16  Jonathan Wakely  <jwakely@redhat.com>
 
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index e34529d8be5..098685739b2 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -71,12 +71,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       static constexpr _Tp                  value = __v;
       typedef _Tp                           value_type;
       typedef integral_constant<_Tp, __v>   type;
-      constexpr operator value_type() const { return value; }
+      constexpr operator value_type() const noexcept { return value; }
 #if __cplusplus > 201103L
 
 #define __cpp_lib_integral_constant_callable 201304
 
-      constexpr value_type operator()() const { return value; }
+      constexpr value_type operator()() const noexcept { return value; }
 #endif
     };
 
diff --git a/libstdc++-v3/include/std/utility b/libstdc++-v3/include/std/utility
index 1d9b8eb4287..978acb747e9 100644
--- a/libstdc++-v3/include/std/utility
+++ b/libstdc++-v3/include/std/utility
@@ -323,7 +323,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     struct integer_sequence
     {
       typedef _Tp value_type;
-      static constexpr size_t size() { return sizeof...(_Idx); }
+      static constexpr size_t size() noexcept { return sizeof...(_Idx); }
     };
 
   template<typename _Tp, _Tp _Num,