diff --git a/tmux.1 b/tmux.1
index 87c1ac8f..5d78b2ea 100644
--- a/tmux.1
+++ b/tmux.1
@@ -61,7 +61,7 @@ A window occupies the entire screen
 and may be split into rectangular panes,
 each of which is a separate pseudo terminal
 (the
-.Xr pty 7
+.Xr pty 4
 manual page documents the technical details of pseudo terminals).
 Any number of
 .Nm