diff --git a/include/pybind11/cast.h b/include/pybind11/cast.h
index 38eb8a88..a0b4d1ba 100644
--- a/include/pybind11/cast.h
+++ b/include/pybind11/cast.h
@@ -1978,7 +1978,7 @@ private:
     }
 
     template <typename Return, typename Func, size_t... Is, typename Guard>
-    Return call_impl(Func &&f, index_sequence<Is...>, Guard &&) {
+    Return call_impl(Func &&f, index_sequence<Is...>, Guard &&) && {
         return std::forward<Func>(f)(cast_op<Args>(std::move(std::get<Is>(argcasters)))...);
     }