diff --git a/configure.ac b/configure.ac
index b94a4d72ff61631081e6633f7499a237d455576c..cb066feaa62f2dc24937b706b9658bbaec9c4bbf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,6 +27,8 @@ AC_CONFIG_FILES([Makefile gnu-compat/Makefile
 		 add_ons/libalbas/Makefile
 		 add_ons/libalbas/src/Makefile
                  add_ons/libalbas/tests/Makefile
+                 add_ons/block_solve/Makefile
+		 add_ons/block_solve/src/Makefile
 		 add_ons/geomview/Makefile
 		 add_ons/grape/Makefile
 		 add_ons/grape/mesh/Makefile