diff --git a/include/boost/interprocess/detail/os_thread_functions.hpp b/include/boost/interprocess/detail/os_thread_functions.hpp
index 645c8be..adbad24 100644
--- a/include/boost/interprocess/detail/os_thread_functions.hpp
+++ b/include/boost/interprocess/detail/os_thread_functions.hpp
@@ -510,8 +510,6 @@ class abstract_thread
    virtual void run() = 0;
 };
 
-#if defined(BOOST_INTERPROCESS_WINDOWS)
-
 template<class T>
 class os_thread_func_ptr_deleter
 {
@@ -536,6 +534,8 @@ class os_thread_func_ptr_deleter
    T *m_p;
 };
 
+#if defined(BOOST_INTERPROCESS_WINDOWS)
+
 inline unsigned __stdcall launch_thread_routine( void * pv )
 {
    os_thread_func_ptr_deleter<abstract_thread> pt( static_cast<abstract_thread *>( pv ) );