diff --git a/src/game_events/wmi_container.hpp b/src/game_events/wmi_container.hpp
index 728cc7437bdf..d69934c005cf 100644
--- a/src/game_events/wmi_container.hpp
+++ b/src/game_events/wmi_container.hpp
@@ -25,6 +25,7 @@
 #include <map>
 #include <memory>
 #include <vector>
+#include <string>
 
 class config;
 class filter_context;
diff --git a/src/hotkey/hotkey_item.hpp b/src/hotkey/hotkey_item.hpp
index 91505d135e4f..15c26009c757 100644
--- a/src/hotkey/hotkey_item.hpp
+++ b/src/hotkey/hotkey_item.hpp
@@ -20,6 +20,7 @@
 #include <SDL.h>
 #include <memory>
 #include <vector>
+#include <string>
 
 class config;
 class CVideo;