diff --git a/src/json.hpp b/src/json.hpp
index 8755cd33a..36280c16e 100644
--- a/src/json.hpp
+++ b/src/json.hpp
@@ -43,7 +43,9 @@ Class @ref nlohmann::basic_json is a good entry point for the documentation.
 #include <cassert>
 #include <ciso646>
 #include <cmath>
+#include <cstddef>
 #include <cstdio>
+#include <cstdlib>
 #include <functional>
 #include <initializer_list>
 #include <iomanip>
@@ -53,6 +55,7 @@ Class @ref nlohmann::basic_json is a good entry point for the documentation.
 #include <map>
 #include <memory>
 #include <sstream>
+#include <stdexcept>
 #include <string>
 #include <type_traits>
 #include <utility>
diff --git a/src/json.hpp.re2c b/src/json.hpp.re2c
index 207208d4f..b88d8fb08 100644
--- a/src/json.hpp.re2c
+++ b/src/json.hpp.re2c
@@ -43,7 +43,9 @@ Class @ref nlohmann::basic_json is a good entry point for the documentation.
 #include <cassert>
 #include <ciso646>
 #include <cmath>
+#include <cstddef>
 #include <cstdio>
+#include <cstdlib>
 #include <functional>
 #include <initializer_list>
 #include <iomanip>
@@ -53,6 +55,7 @@ Class @ref nlohmann::basic_json is a good entry point for the documentation.
 #include <map>
 #include <memory>
 #include <sstream>
+#include <stdexcept>
 #include <string>
 #include <type_traits>
 #include <utility>