diff --git a/include/nlohmann/detail/iterators/iteration_proxy.hpp b/include/nlohmann/detail/iterators/iteration_proxy.hpp
index c61d96296ce..7d0f1e59105 100644
--- a/include/nlohmann/detail/iterators/iteration_proxy.hpp
+++ b/include/nlohmann/detail/iterators/iteration_proxy.hpp
@@ -15,7 +15,9 @@ namespace detail
 template<typename string_type>
 void int_to_string( string_type& target, std::size_t value )
 {
-    target = std::to_string(value);
+    // For ADL
+    using std::to_string;
+    target = to_string(value);
 }
 template <typename IteratorType> class iteration_proxy_value
 {
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index cc822a543be..a6f9af99bf9 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -3653,7 +3653,9 @@ namespace detail
 template<typename string_type>
 void int_to_string( string_type& target, std::size_t value )
 {
-    target = std::to_string(value);
+    // For ADL
+    using std::to_string;
+    target = to_string(value);
 }
 template <typename IteratorType> class iteration_proxy_value
 {