diff --git a/test/sp_interlocked_test.cpp b/test/sp_interlocked_test.cpp
index d02bac7..1b075b4 100644
--- a/test/sp_interlocked_test.cpp
+++ b/test/sp_interlocked_test.cpp
@@ -8,11 +8,11 @@
 //  http://www.boost.org/LICENSE_1_0.txt
 //
 
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
+
 #include <boost/smart_ptr/detail/sp_interlocked.hpp>
 #include <boost/detail/lightweight_test.hpp>
 
-#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
-
 int main()
 {
     long x = 0, r;