diff -r fe7fc19b1e64 sys/man/1/tar
--- a/sys/man/1/tar	Sun Nov 03 15:20:57 2019 +0100
+++ b/sys/man/1/tar	Sun Nov 03 23:13:38 2019 +0100
@@ -195,6 +195,10 @@
 key (append)
 cannot be used on compressed archives.
 .PP
+The
+.B T
+key (write metadata) won't work for non-empty directories.
+.PP
 .IR Tar ,
 thus
 .IR dircp ,