diff --git a/eo/configure.in b/eo/configure.in
index efc5d00a..c0bfd5ee 100644
--- a/eo/configure.in
+++ b/eo/configure.in
@@ -71,6 +71,7 @@ AC_CONFIG_FILES([Makefile \
           tutorial/Lesson3/Makefile \
           tutorial/Lesson4/Makefile \
           tutorial/Lesson5/Makefile \
+	  tutorial/Lesson6/Makefile \
           tutorial/Templates/Makefile \
           tutorial/pdf/Makefile \
           win/Makefile])