diff --git a/include/libtorrent/alert_types.hpp b/include/libtorrent/alert_types.hpp
index 4dfc48b6c..02191623f 100644
--- a/include/libtorrent/alert_types.hpp
+++ b/include/libtorrent/alert_types.hpp
@@ -1114,8 +1114,11 @@ TORRENT_VERSION_NAMESPACE_2
 	{
 		// internal
 		save_resume_data_alert(aux::stack_allocator& alloc
-			, add_torrent_params params
+			, add_torrent_params&& params
 			, torrent_handle const& h);
+		save_resume_data_alert(aux::stack_allocator& alloc
+			, add_torrent_params const& params
+			, torrent_handle const& h) = delete;
 
 		TORRENT_DEFINE_ALERT_PRIO(save_resume_data_alert, 37, alert_priority_critical)
 
diff --git a/src/alert.cpp b/src/alert.cpp
index 797177899..24fff4203 100644
--- a/src/alert.cpp
+++ b/src/alert.cpp
@@ -741,7 +741,7 @@ namespace libtorrent {
 	}
 
 	save_resume_data_alert::save_resume_data_alert(aux::stack_allocator& alloc
-		, add_torrent_params p
+		, add_torrent_params&& p
 		, torrent_handle const& h)
 		: torrent_alert(alloc, h)
 		, params(std::move(p))