diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 752f8d8af..3ccab3001 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -38,7 +38,9 @@ SOFTWARE.
 #include <cstddef> // nullptr_t, ptrdiff_t, size_t
 #include <functional> // hash, less
 #include <initializer_list> // initializer_list
-#include <iosfwd> // istream, ostream
+#ifndef JSON_NO_IO
+    #include <iosfwd> // istream, ostream
+#endif  // JSON_NO_IO
 #include <iterator> // random_access_iterator_tag
 #include <memory> // unique_ptr
 #include <numeric> // accumulate
@@ -4721,9 +4723,7 @@ std::size_t hash(const BasicJsonType& j)
 
 #include <array> // array
 #include <cstddef> // size_t
-#include <cstdio> //FILE *
 #include <cstring> // strlen
-#include <istream> // istream
 #include <iterator> // begin, end, iterator_traits, random_access_iterator_tag, distance, next
 #include <memory> // shared_ptr, make_shared, addressof
 #include <numeric> // accumulate
@@ -4731,6 +4731,11 @@ std::size_t hash(const BasicJsonType& j)
 #include <type_traits> // enable_if, is_base_of, is_pointer, is_integral, remove_pointer
 #include <utility> // pair, declval
 
+#ifndef JSON_NO_IO
+    #include <cstdio>   //FILE *
+    #include <istream>  // istream
+#endif                  // JSON_NO_IO
+
 // #include <nlohmann/detail/iterators/iterator_traits.hpp>
 
 // #include <nlohmann/detail/macro_scope.hpp>
@@ -12619,12 +12624,16 @@ class json_ref
 
 #include <algorithm> // copy
 #include <cstddef> // size_t
-#include <ios> // streamsize
 #include <iterator> // back_inserter
 #include <memory> // shared_ptr, make_shared
-#include <ostream> // basic_ostream
 #include <string> // basic_string
 #include <vector> // vector
+
+#ifndef JSON_NO_IO
+    #include <ios>      // streamsize
+    #include <ostream>  // basic_ostream
+#endif  // JSON_NO_IO
+
 // #include <nlohmann/detail/macro_scope.hpp>
 
 
@@ -23378,7 +23387,7 @@ class basic_json
         parser(detail::input_adapter(i)).parse(false, j);
         return i;
     }
-#endif // JSON_NO_IO
+#endif  // JSON_NO_IO
     /// @}
 
     ///////////////////////////