1 files changed, 8 insertions, 0 deletions
diff --git a/mandoc.1 b/mandoc.1
index 00d898eb..05026a61 100644
--- a/mandoc.1
+++ b/mandoc.1
@@ -2371,6 +2371,14 @@ The
 .Fl O Cm tag
 option was specified but the tag was not found in any of the displayed
 manual pages.
+.It Sy "\-Tmarkdown unsupported for man(7) input"
+.Pq man
+The
+.Fl T Cm markdown
+option was specified but an input file uses the
+.Xr man 7
+language.
+No output is produced for that input file.
 .El
 .Sh SEE ALSO
 .Xr apropos 1 ,