--- bc-1.06/configure.orig	2007-12-04 10:29:01.000000000 +0100
+++ bc-1.06/configure	2007-12-04 10:29:42.000000000 +0100
@@ -2245,7 +2245,7 @@
 
 
 if test "$LEX" = "flex" ; then
- LEX="flex -I8"
+ LEX="flex -I -8"
 else
  if test "$bcrl" = "y" ; then
   echo "configure: warning: readline works only with flex." 1>&2