diff --git a/source/mijin/util/iterators.hpp b/source/mijin/util/iterators.hpp
index 4e50549..fd08e84 100644
--- a/source/mijin/util/iterators.hpp
+++ b/source/mijin/util/iterators.hpp
@@ -428,7 +428,7 @@ struct MappingRange : RangeAdapter
 {
     // using value_type = typename std::iterator_traits<decltype(std::begin(std::declval<TIterable>()))>::value_type;
     using in_value_type = typename std::iterator_traits<decltype(std::declval<RangeRef<TIterable>>().begin())>::value_type;
-    using value_type = std::result_of_t<TFunctor(in_value_type)>;
+    using value_type = std::invoke_result_t<TFunctor, in_value_type>;
 
     RangeRef<TIterable> base;
     TFunctor functor;