diff --git a/data/templates/default.ms b/data/templates/default.ms
index 16c179235..f5cd73496 100644
--- a/data/templates/default.ms
+++ b/data/templates/default.ms
@@ -1,3 +1,4 @@
+.mso www.tmac
 .\" **** Custom macro definitions ****
 .\" * Super/subscript
 .\" (https://lists.gnu.org/archive/html/groff/2012-07/msg00046.html)