diff --git a/include/boost/fiber/detail/scheduler.hpp b/include/boost/fiber/detail/scheduler.hpp
index 52b2509a..187d0291 100644
--- a/include/boost/fiber/detail/scheduler.hpp
+++ b/include/boost/fiber/detail/scheduler.hpp
@@ -36,7 +36,8 @@ public:
     static fiber_base::ptr_t extract( F const& f)
     { return f.impl_; }
 
-    static algorithm * instance() BOOST_NOEXCEPT;
+    static algorithm * instance() BOOST_NOEXCEPT
+    { return instance_.get(); }
 
     static algorithm * replace( algorithm * other) BOOST_NOEXCEPT;
 };
diff --git a/src/detail/scheduler.cpp b/src/detail/scheduler.cpp
index 955c2152..be0e33b9 100644
--- a/src/detail/scheduler.cpp
+++ b/src/detail/scheduler.cpp
@@ -19,13 +19,6 @@ static void cleanup_function( algorithm *) {}
 
 thread_specific_ptr< algorithm > scheduler::instance_( cleanup_function);
 
-algorithm *
-scheduler::instance() BOOST_NOEXCEPT
-{
-    BOOST_ASSERT( instance_.get() );
-    return instance_.get();
-}
-
 algorithm *
 scheduler::replace( algorithm * other) BOOST_NOEXCEPT
 {