--- modules/mod_auth_unix.c.orig	2006-06-29 09:16:23.000000000 -0800
+++ modules/mod_auth_unix.c	2007-10-05 16:23:46.000000000 -0800
@@ -57,6 +57,7 @@
 #endif /* HAVE_HPSECURITY_H or HPUX10 or HPUX11 */
 
 #if defined(HAVE_PROT_H) || defined(COMSEC)
+# include <krb.h>
 # include <prot.h>
 #endif