diff --git a/tmux.1 b/tmux.1
index cd60bfcc..9104f218 100644
--- a/tmux.1
+++ b/tmux.1
@@ -834,7 +834,7 @@ is used,
 .Fl x
 and
 .Fl y
-specify the size of the initial window (80 by 24 if not given).
+specify the size of the initial window.
 .Pp
 If run from a terminal, any
 .Xr termios 4