--- Libc/Libc-763.13/gen/directory.3
+++ Libc/Libc-825.40.1/gen/directory.3
@@ -163,9 +163,12 @@
 .Fn dirfd
 function
 returns the integer file descriptor associated with the named
-.Em directory stream ,
-see
+.Em directory stream 
+on success, see
 .Xr open 2 .
+On failure, \-1 is returned and the global variable
+.Va errno
+is set to indicate the error.
 .Pp
 Sample code which searches a directory for entry ``name'' is:
 .Bd -literal -offset indent