diff --git a/contrib/groff/tmac/tmac.andoc b/contrib/groff/tmac/tmac.andoc
index 8cf989c09cf..ecf0891308c 100644
--- a/contrib/groff/tmac/tmac.andoc
+++ b/contrib/groff/tmac/tmac.andoc
@@ -7,6 +7,6 @@
 ..
 .de TH
 .rm TH
-.do mso tmac.an
+.do mso tmac.groff_an
 \\*(TH\\
 ..