diff --git a/include/boost/fiber/context.hpp b/include/boost/fiber/context.hpp
index e42961fb..ed9eeb89 100644
--- a/include/boost/fiber/context.hpp
+++ b/include/boost/fiber/context.hpp
@@ -141,7 +141,7 @@ private:
         void                                *   vp{ nullptr };
         detail::fss_cleanup_function::ptr_t     cleanup_function{};
 
-        constexpr fss_data() = default;
+        constexpr fss_data() noexcept = default;
 
         fss_data( void * vp_,
                   detail::fss_cleanup_function::ptr_t const& fn) noexcept :
@@ -159,7 +159,7 @@ private:
         detail::spinlock_lock   *   lk{ nullptr };
         context                 *   ctx{ nullptr };
 
-        constexpr data_t() = default;
+        constexpr data_t() noexcept = default;
 
         explicit data_t( detail::spinlock_lock * lk_) noexcept :
             lk{ lk_ } {
@@ -213,7 +213,7 @@ public:
         context  *   impl_{ nullptr };
 
     public:
-        constexpr id() = default;
+        constexpr id() noexcept = default;
 
         explicit id( context * impl) noexcept :
             impl_( impl) {
diff --git a/include/boost/fiber/fiber.hpp b/include/boost/fiber/fiber.hpp
index 29bbc316..6cab4424 100644
--- a/include/boost/fiber/fiber.hpp
+++ b/include/boost/fiber/fiber.hpp
@@ -42,7 +42,7 @@ private:
 public:
     typedef context::id    id;
 
-    constexpr fiber() = default;
+    constexpr fiber() noexcept = default;
 
     template< typename Fn, typename ... Args >
     fiber( Fn && fn, Args && ... args) :
diff --git a/include/boost/fiber/future/future.hpp b/include/boost/fiber/future/future.hpp
index 0300d820..9c2e5042 100644
--- a/include/boost/fiber/future/future.hpp
+++ b/include/boost/fiber/future/future.hpp
@@ -28,7 +28,7 @@ struct future_base {
 
     ptr_t           state_{};
 
-    constexpr future_base() = default;
+    constexpr future_base() noexcept = default;
 
     explicit future_base( ptr_t const& p) noexcept :
         state_{ p } {
@@ -106,7 +106,7 @@ private:
     friend class shared_future< R >;
 
 public:
-    constexpr future() = default;
+    constexpr future() noexcept = default;
 
     explicit future( typename base_t::ptr_t const& p) noexcept :
         base_t{ p } {
@@ -151,7 +151,7 @@ private:
     friend class shared_future< R & >;
 
 public:
-    constexpr future() = default;
+    constexpr future() noexcept = default;
 
     explicit future( typename base_t::ptr_t const& p) noexcept :
         base_t{ p  } {
@@ -196,7 +196,7 @@ private:
     friend class shared_future< void >;
 
 public:
-    constexpr future() = default;
+    constexpr future() noexcept = default;
 
     explicit future( base_t::ptr_t const& p) noexcept :
         base_t{ p } {
@@ -247,7 +247,7 @@ private:
     }
 
 public:
-    constexpr shared_future() = default;
+    constexpr shared_future() noexcept = default;
 
     ~shared_future() = default;
 
@@ -304,7 +304,7 @@ private:
     }
 
 public:
-    constexpr shared_future() = default;
+    constexpr shared_future() noexcept = default;
 
     ~shared_future() = default;
 
@@ -361,7 +361,7 @@ private:
     }
 
 public:
-    constexpr shared_future() = default;
+    constexpr shared_future() noexcept = default;
 
     ~shared_future() = default;
 
diff --git a/include/boost/fiber/future/packaged_task.hpp b/include/boost/fiber/future/packaged_task.hpp
index 218057af..e15a625e 100644
--- a/include/boost/fiber/future/packaged_task.hpp
+++ b/include/boost/fiber/future/packaged_task.hpp
@@ -34,7 +34,7 @@ private:
     ptr_t           task_{};
 
 public:
-    constexpr packaged_task() = default;
+    constexpr packaged_task() noexcept = default;
 
     ~packaged_task() {
         if ( task_) {