diff --git a/include/boost/context/fiber_ucontext.hpp b/include/boost/context/fiber_ucontext.hpp
index 687e1c2..92e8fa4 100644
--- a/include/boost/context/fiber_ucontext.hpp
+++ b/include/boost/context/fiber_ucontext.hpp
@@ -241,10 +241,10 @@ struct BOOST_CONTEXT_DECL fiber_activation_record_initializer {
     ~fiber_activation_record_initializer();
 };
 
-struct forced_unwind {
+struct fiber_forced_unwind {
     fiber_activation_record  *  from{ nullptr };
 
-    forced_unwind( fiber_activation_record * from_) noexcept :
+    fiber_forced_unwind( fiber_activation_record * from_) noexcept :
         from{ from_ } {
     }
 };
@@ -290,7 +290,7 @@ public:
 #else
             c = std::invoke( fn_, std::move( c) );
 #endif
-        } catch ( forced_unwind const& ex) {
+        } catch ( fiber_forced_unwind const& ex) {
             c = Ctx{ ex.from };
         }
         // this context has finished its task
@@ -488,7 +488,7 @@ public:
         detail::fiber_activation_record * ptr = std::exchange( ptr_, nullptr)->resume();
 #endif
         if ( BOOST_UNLIKELY( detail::fiber_activation_record::current()->force_unwind) ) {
-            throw detail::forced_unwind{ ptr};
+            throw detail::fiber_forced_unwind{ ptr};
         } else if ( BOOST_UNLIKELY( nullptr != detail::fiber_activation_record::current()->ontop) ) {
             ptr = detail::fiber_activation_record::current()->ontop( ptr);
             detail::fiber_activation_record::current()->ontop = nullptr;
@@ -507,7 +507,7 @@ public:
             std::exchange( ptr_, nullptr)->resume_with< fiber >( std::forward< Fn >( fn) );
 #endif
         if ( BOOST_UNLIKELY( detail::fiber_activation_record::current()->force_unwind) ) {
-            throw detail::forced_unwind{ ptr};
+            throw detail::fiber_forced_unwind{ ptr};
         } else if ( BOOST_UNLIKELY( nullptr != detail::fiber_activation_record::current()->ontop) ) {
             ptr = detail::fiber_activation_record::current()->ontop( ptr);
             detail::fiber_activation_record::current()->ontop = nullptr;