diff --git a/include/boost/fiber/fiber.hpp b/include/boost/fiber/fiber.hpp
index afee7171..eb10487c 100644
--- a/include/boost/fiber/fiber.hpp
+++ b/include/boost/fiber/fiber.hpp
@@ -15,6 +15,7 @@
 #include <boost/assert.hpp>
 #include <boost/config.hpp>
 #include <boost/intrusive_ptr.hpp>
+#include <boost/predef.h>
 
 #include <boost/fiber/detail/config.hpp>
 #include <boost/fiber/detail/disable_overload.hpp>
@@ -53,9 +54,15 @@ public:
 
     template< typename Fn,
               typename ... Arg,
-              typename = detail::disable_overload< fiber, Fn >
+              typename = detail::disable_overload< fiber, Fn >,
+              typename = detail::disable_overload< launch, Fn >,
+              typename = detail::disable_overload< std::allocator_arg_t, Fn >
     >
+#if BOOST_COMP_GNUC < 50000000
+    fiber( Fn && fn, Arg && ... arg) :
+#else
     fiber( Fn && fn, Arg ... arg) :
+#endif
         fiber{ launch::post,
                std::allocator_arg, default_stack(),
                std::forward< Fn >( fn), std::forward< Arg >( arg) ... } {
@@ -65,7 +72,11 @@ public:
               typename ... Arg,
               typename = detail::disable_overload< fiber, Fn >
     >
+#if BOOST_COMP_GNUC < 50000000
+    fiber( launch policy, Fn && fn, Arg && ... arg) :
+#else
     fiber( launch policy, Fn && fn, Arg ... arg) :
+#endif
         fiber{ policy,
                std::allocator_arg, default_stack(),
                std::forward< Fn >( fn), std::forward< Arg >( arg) ... } {
@@ -75,7 +86,11 @@ public:
               typename Fn,
               typename ... Arg
     >
+#if BOOST_COMP_GNUC < 50000000
+    fiber( std::allocator_arg_t, StackAllocator salloc, Fn && fn, Arg && ... arg) :
+#else
     fiber( std::allocator_arg_t, StackAllocator salloc, Fn && fn, Arg ... arg) :
+#endif
         fiber{ launch::post,
                std::allocator_arg, salloc,
                std::forward< Fn >( fn), std::forward< Arg >( arg) ... } {
@@ -85,7 +100,11 @@ public:
               typename Fn,
               typename ... Arg
     >
+#if BOOST_COMP_GNUC < 50000000
+    fiber( launch policy, std::allocator_arg_t, StackAllocator salloc, Fn && fn, Arg && ... arg) :
+#else
     fiber( launch policy, std::allocator_arg_t, StackAllocator salloc, Fn && fn, Arg ... arg) :
+#endif
         impl_{ make_worker_context( policy, salloc, std::forward< Fn >( fn), std::forward< Arg >( arg) ... ) } {
         start_();
     }