--- boost/detail/atomic_count_gcc.hpp
+++ boost/detail/atomic_count_gcc.hpp
@@ -17,7 +17,7 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
-#include <bits/atomicity.h>
+#include <ext/atomicity.h>
 
 namespace boost
 {