--- a/src/settings_window.cc
+++ b/src/settings_window.cc
@@ -6,6 +6,7 @@
 // This file is for your program, I won't touch it again!
 
 #include <gtkmm.h>
+#include <cstring>
 #include "config.h"
 #include "settings_window.hh"
 

--- a/src/main_window.cc
+++ b/src/main_window.cc
@@ -9,6 +9,8 @@
 #include <gtkmm.h>
 #include <gtkmm/main.h>
 #include <iomanip>
+#include <cstring>
+#include <sys/stat.h>
 #include "config.h"
 #include "main_window.hh"