diff --git a/include/Makefile.am b/include/Makefile.am
index e33f2acbd..b3a10a4ef 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -202,7 +202,6 @@ libtorrent/asio/detail/win_event.hpp \
 libtorrent/asio/detail/win_fd_set_adapter.hpp \
 libtorrent/asio/detail/win_iocp_io_service.hpp \
 libtorrent/asio/detail/win_iocp_io_service_fwd.hpp \
-libtorrent/asio/detail/win_iocp_operation.hpp \
 libtorrent/asio/detail/win_iocp_socket_service.hpp \
 libtorrent/asio/detail/win_mutex.hpp \
 libtorrent/asio/detail/win_signal_blocker.hpp \