diff --git a/src/citymania/cm_settings.hpp b/src/citymania/cm_settings.hpp
index fafb17bcf7..950aa7478a 100644
--- a/src/citymania/cm_settings.hpp
+++ b/src/citymania/cm_settings.hpp
@@ -3,8 +3,7 @@
 
 #include <memory>
 #include <vector>
-
-// #include "types.hpp"
+#include <string>
 
 namespace citymania {