diff --git a/inc/md2html.cfg b/inc/md2html.cfg
index a1317b599..2497946df 100644
--- a/inc/md2html.cfg
+++ b/inc/md2html.cfg
@@ -202,7 +202,7 @@ years.md
 	bin/subst.default.sh
 	-o
 	bin/subst.year-index.sh
-	-b
+	-a
 	bin/output-year-index.sh
 	-D
 	../
@@ -212,7 +212,7 @@ mock/README.md
 	bin/subst.default.sh
 	-o
 	bin/subst.year-index.sh
-	-b
+	-a
 	bin/output-year-index.sh
 	-D
 	../