diff --git a/toml/comments.hpp b/toml/comments.hpp
index 1e17544..92fc8e1 100644
--- a/toml/comments.hpp
+++ b/toml/comments.hpp
@@ -4,6 +4,7 @@
 #define TOML11_COMMENTS_HPP
 #include <initializer_list>
 #include <iterator>
+#include <stdexcept>
 #include <string>
 #include <type_traits>
 #include <utility>
diff --git a/toml/source_location.hpp b/toml/source_location.hpp
index a386710..fa175b5 100644
--- a/toml/source_location.hpp
+++ b/toml/source_location.hpp
@@ -3,6 +3,7 @@
 #ifndef TOML11_SOURCE_LOCATION_HPP
 #define TOML11_SOURCE_LOCATION_HPP
 #include <cstdint>
+#include <sstream>
 
 #include "region.hpp"