diff --git a/asio/include/Makefile.am b/asio/include/Makefile.am
index 99a4aa0e..e7fa5707 100644
--- a/asio/include/Makefile.am
+++ b/asio/include/Makefile.am
@@ -87,6 +87,7 @@ nobase_include_HEADERS = \
 	asio/detail/win_fd_set_adapter.hpp \
 	asio/detail/win_iocp_io_service.hpp \
 	asio/detail/win_iocp_io_service_fwd.hpp \
+	asio/detail/win_iocp_handle_service.hpp \
 	asio/detail/win_iocp_socket_service.hpp \
 	asio/detail/win_mutex.hpp \
 	asio/detail/win_signal_blocker.hpp \