diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index 5fdb8c9002..e2491a4249 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -18,6 +18,16 @@
 #ifndef INCLUDE_NLOHMANN_JSON_HPP_
 #define INCLUDE_NLOHMANN_JSON_HPP_
 
+
+
+
+
+#include <iostream>
+
+
+
+
+
 #include <algorithm> // all_of, find, for_each
 #include <cstddef> // nullptr_t, ptrdiff_t, size_t
 #include <functional> // hash, less