diff --git a/include/boost/math/special_functions/hankel.hpp b/include/boost/math/special_functions/hankel.hpp
index a0852ee4a..f322bacd3 100644
--- a/include/boost/math/special_functions/hankel.hpp
+++ b/include/boost/math/special_functions/hankel.hpp
@@ -175,4 +175,5 @@ inline std::complex<typename detail::bessel_traits<T1, T2, policies::policy<> >:
 
 }} // namespaces
 
-#endif // BOOST_MATH_HANKEL_HPP
\ No newline at end of file
+#endif // BOOST_MATH_HANKEL_HPP
+