diff -ru krb5-1.6.3/src/lib/krb5/os/dnsglue.h krb5-1.6.3+iPhone/src/lib/krb5/os/dnsglue.h
--- krb5-1.6.3/src/lib/krb5/os/dnsglue.h	2006-04-01 03:08:17.000000000 +0000
+++ krb5-1.6.3+iPhone/src/lib/krb5/os/dnsglue.h	2008-03-24 13:05:14.000000000 +0000
@@ -109,6 +109,9 @@
 /*
  * Some BIND implementations might be old enough to lack these.
  */
+#ifndef C_IN
+#define C_IN 1
+#endif
 #ifndef T_TXT
 #define T_TXT 15
 #endif