diff -up sudo-1.6.9p12/configure.in.noPam sudo-1.6.9p12/configure.in
--- sudo-1.6.9p12/configure.in.noPam	2008-02-05 13:52:07.000000000 +0100
+++ sudo-1.6.9p12/configure.in	2008-02-05 13:52:25.000000000 +0100
@@ -1842,7 +1842,7 @@ if test ${with_pam-"no"} != "no"; then
 		yes)	AC_MSG_RESULT(yes)
 			;;
 		no)		AC_MSG_RESULT(no)
-			    AC_DEFINE(NO_PAM_SESSION)
+			    AC_DEFINE([NO_PAM_SESSION], [], [PAM session support disabled])
 			    ;;
 		*)		AC_MSG_RESULT(no)
 			    AC_MSG_WARN([Ignoring unknown argument to --enable-pam-session: $enableval])