diff --git a/include/libtorrent/aux_/allocating_handler.hpp b/include/libtorrent/aux_/allocating_handler.hpp
index 58ba8a063..d97536f4f 100644
--- a/include/libtorrent/aux_/allocating_handler.hpp
+++ b/include/libtorrent/aux_/allocating_handler.hpp
@@ -55,6 +55,8 @@ namespace libtorrent { namespace aux
 		{}
 
 		bool used;
+#else
+		handler_storage() = default;
 #endif
 		typename aux::aligned_storage<Size>::type bytes;
 	private: