diff --git a/macros b/macros
index 0976238..b1a41fc 100644
--- a/macros
+++ b/macros
@@ -135,3 +135,9 @@ export LANG\
 #
 # Note: The default value is 0 for legacy compatibility.
 %_missing_doc_files_terminate_build    0
+
+#
+# Should unpackaged files in a build root terminate a build?
+#
+# Note: The default value should be 0 for legacy compatibility.
+%_unpackaged_files_terminate_build    0