diff --git a/cf/krb-struct-spwd.m4 b/cf/krb-struct-spwd.m4
index c088129eb..0ded25287 100644
--- a/cf/krb-struct-spwd.m4
+++ b/cf/krb-struct-spwd.m4
@@ -1,10 +1,10 @@
-dnl $Id
+dnl $Id$
 dnl
 dnl Test for `struct spwd'
 
 AC_DEFUN(AC_KRB_STRUCT_SPWD, [
 AC_MSG_CHECKING(for struct spwd)
-AC_CACHE_VAL(ac_cv_type_struct_spwd, [
+AC_CACHE_VAL(ac_cv_struct_spwd, [
 AC_TRY_COMPILE(
 [#include <pwd.h>
 #ifdef HAVE_SHADOW_H