diff --git a/_gtfobins/man.md b/_gtfobins/man.md
index dafd551..eb3b8d2 100644
--- a/_gtfobins/man.md
+++ b/_gtfobins/man.md
@@ -5,6 +5,9 @@ functions:
     - code: |
         man man
         !/bin/sh
+    - description: This only works for GNU `man` and requires GNU `troff` (`groff` to be installed).
+      code: |
+        man '-H/bin/sh #' man
   file-read:
     - code: man file_to_read
   sudo: