diff --git a/org/channel-tui-main.org b/org/channel-tui-main.org
index ea4f545..99710a5 100644
--- a/org/channel-tui-main.org
+++ b/org/channel-tui-main.org
@@ -967,7 +967,12 @@ Event handlers + daemon I/O + main loop.
                  (when cl-tty.input::*terminal-resized-p*
                    (setf cl-tty.input::*terminal-resized-p* nil)
                    (multiple-value-setq (w h) (cl-tty.backend:backend-size be))
+                   (setq w (or (and (numberp w) (> w 0) w) 80)
+                         h (or (and (numberp h) (> h 0) h) 24))
                    (setf (st :dirty) (list t t t))))
+               ;; Guard w and h before render (resize or other code may have set them to nil)
+               (setq w (or (and (numberp w) (> w 0) w) 80)
+                     h (or (and (numberp h) (> h 0) h) 24))
                              (when (or (first (st :dirty)) (second (st :dirty)) (third (st :dirty)))
                 (cl-tty.backend:backend-clear be)
                 (view-status be w h)