diff -u -r cyrus-sasl-2.1.21-orig/cmulocal/sasl2.m4 cyrus-sasl-2.1.21/cmulocal/sasl2.m4
--- cyrus-sasl-2.1.21-orig/cmulocal/sasl2.m4	2006-08-01 08:29:59.000000000 +0200
+++ cyrus-sasl-2.1.21/cmulocal/sasl2.m4	2006-08-01 08:31:32.000000000 +0200
@@ -257,7 +257,21 @@
 
   cmu_save_LIBS="$LIBS"
   LIBS="$LIBS $GSSAPIBASE_LIBS"
-  AC_CHECK_FUNCS(gsskrb5_register_acceptor_identity)
+  dnl AC_CHECK_FUNCS(gsskrb5_register_acceptor_identity)
+  AC_CHECK_HEADER(gssapi/gssapi_krb5.h, AC_DEFINE(HAVE_GSSAPI_GSSAPI_KRB5_H,,[Define if you have the gssapi/gssapi_krb5.h header file]))
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#ifdef HAVE_GSSAPI_H
+#include <gssapi.h>
+#else
+#include <gssapi/gssapi.h>
+#endif
+#ifdef HAVE_GSSAPI_GSSAPI_KRB5_H
+#include <gssapi/gssapi_krb5.h>
+#endif
+]],[[gsskrb5_register_acceptor_identity("");]])
+],[AC_DEFINE(HAVE_GSSKRB5_REGISTER_ACCEPTOR_IDENTITY,,
+             [Define if your GSSAPI implimentation defines GSSKRB5_REGISTER_ACCEPTOR_IDENTITY])
+])
   LIBS="$cmu_save_LIBS"
 else
   AC_MSG_RESULT([disabled])
diff -u -r cyrus-sasl-2.1.21-orig/plugins/gssapi.c cyrus-sasl-2.1.21/plugins/gssapi.c
--- cyrus-sasl-2.1.21-orig/plugins/gssapi.c	2004-07-21 16:39:06.000000000 +0200
+++ cyrus-sasl-2.1.21/plugins/gssapi.c	2006-08-01 08:30:26.000000000 +0200
@@ -50,6 +50,9 @@
 #else
 #include <gssapi/gssapi.h>
 #endif
+#ifdef HAVE_GSSAPI_GSSAPI_KRB5_H
+#include <gssapi/gssapi_krb5.h> 
+#endif
 
 #ifdef WIN32
 #  include <winsock2.h>