--- open-invaders-0.3.old/src/init.cc
+++ open-invaders-0.3/src/init.cc
@@ -22,6 +22,9 @@
  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
+#include <sys/types.h>
+#include <sys/stat.h>
+
 #include <allegro.h>
 #include <aldumb.h>
 #include <string.h>