diff -burN bogofilter-0.16.4.orig/configure.ac bogofilter-0.16.4/configure.ac
--- bogofilter-0.16.4.orig/configure.ac	2004-02-05 18:40:11.998145456 +0100
+++ bogofilter-0.16.4/configure.ac	2004-02-05 19:07:20.235615736 +0100
@@ -514,7 +514,7 @@
 export PATH
 
 need_my_gsl=1
-AC_ARG_WITH(included-gsl, AC_HELP_STRING([--with-included-gsl],[force use of shipped GSL rather than system GSL]),
+AC_ARG_WITH(included-gsl, ([--with-included-gsl],[force use of shipped GSL rather than system GSL]),
 if test "x$WITHVAL" != "xyes" ; then need_my_gsl=2 ; fi)
 
 if test "$need_my_gsl" = 1 ; then