diff --git a/include/nlohmann/detail/conversions/from_json.hpp b/include/nlohmann/detail/conversions/from_json.hpp
index 41146cd21..84b55f229 100644
--- a/include/nlohmann/detail/conversions/from_json.hpp
+++ b/include/nlohmann/detail/conversions/from_json.hpp
@@ -277,7 +277,7 @@ template < typename BasicJsonType, typename T, std::size_t... Idx >
 std::array<T, sizeof...(Idx)> from_json_inplace_array_impl(BasicJsonType&& j,
         identity_tag<std::array<T, sizeof...(Idx)>> /*unused*/, index_sequence<Idx...> /*unused*/)
 {
-    return { { j.at(Idx).template get < T&& > ()... } };
+    return { { std::forward<BasicJsonType>(j).at(Idx).template get < T&& > ()... } };
 }
 
 template < typename BasicJsonType, typename T, std::size_t... Idx >
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 2db129e56..d88467d85 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -4904,7 +4904,7 @@ template < typename BasicJsonType, typename T, std::size_t... Idx >
 std::array<T, sizeof...(Idx)> from_json_inplace_array_impl(BasicJsonType&& j,
         identity_tag<std::array<T, sizeof...(Idx)>> /*unused*/, index_sequence<Idx...> /*unused*/)
 {
-    return { { j.at(Idx).template get < T&& > ()... } };
+    return { { std::forward<BasicJsonType>(j).at(Idx).template get < T&& > ()... } };
 }
 
 template < typename BasicJsonType, typename T, std::size_t... Idx >