--- src/common/OS/directory.C.orig	Thu Jan 30 18:58:15 1997
+++ src/common/OS/directory.C	Fri Oct 22 14:58:52 1999
@@ -32,6 +32,7 @@
  * includes <sys/dir.h>, which is silly because <sys/dir.h>
  * needs <sys/types.h>.
  */
+#include <sys/types.h>
 #include "types.h"
 #ifdef apollo
 #include <sys/dir.h>