diff --git a/configure.ac b/configure.ac
index 04c89e7d2..2ca990d84 100644
--- a/configure.ac
+++ b/configure.ac
@@ -546,4 +546,8 @@ AC_CONFIG_FILES([Makefile
                  src/templating/Makefile
                  src/util/Makefile
                  ])
+# TODO:
+# src/extensions/policy_null/Makefile
+# src/extensions/policy_merchant_refund/Makefile
+# src/extensions/policy_escrowed_payment/Makefile
 AC_OUTPUT