--- a/configure.ac
+++ b/configure.ac
@@ -75,7 +75,7 @@ AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET
 
-AC_PROG_LEX(yywrap)
+AC_PROG_LEX(noyywrap)
 if test "x$LEX" != xflex; then
   echo "************************"
   echo "flex not found"