diff --git a/share/man/man4/tty.4 b/share/man/man4/tty.4
index ef5bed8be554..0806d30041a4 100644
--- a/share/man/man4/tty.4
+++ b/share/man/man4/tty.4
@@ -360,9 +360,9 @@ is cleared in the terminal.
 The total number of input and output bytes
 through all terminal devices
 are available via the
-.Va kern.tk_nin
+.Va kern.tty_nin
 and
-.Va kern.tk_nout
+.Va kern.tty_nout
 read-only
 .Xr sysctl 8
 variables.