diff --git a/configure.ac b/configure.ac
index 7ffa28d282b349ad054a8e150fac0d6282d641cd..920d21e17841594701347991c251da32a79366d6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,6 +27,7 @@ AC_CONFIG_FILES([Makefile gnu-compat/Makefile
                  alberta_util/src/alberta_util_inlines.h.in
                  alberta_util/src/alberta_util.h.in
 		 add_ons/Makefile
+		 add_ons/sub_refinement/Makefile
 		 add_ons/libalbas/Makefile
 		 add_ons/libalbas/src/Makefile
                  add_ons/libalbas/tests/Makefile