diff --git a/include/boost/detail/atomic_count_gcc.hpp b/include/boost/detail/atomic_count_gcc.hpp
index 1160e44..9a1820d 100644
--- a/include/boost/detail/atomic_count_gcc.hpp
+++ b/include/boost/detail/atomic_count_gcc.hpp
@@ -17,7 +17,11 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
-#include <bits/atomicity.h>
+#if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 2))
+# include <ext/atomicity.h>
+#else
+# include <bits/atomicity.h>
+#endif
 
 namespace boost
 {