diff --git a/init.d/basics/ui.el b/init.d/basics/ui.el
index b66861c..208f4dd 100644
--- a/init.d/basics/ui.el
+++ b/init.d/basics/ui.el
@@ -1,6 +1,6 @@
 ;;; ui.el --- Configure user interfaces. -*- lexical-binding: t; -*-
 
-;; Time-stamp: <2020-11-29T11:51:57+0100>
+;; Time-stamp: <2020-11-29T15:49:11+0100>
 
 ;;; Commentary:
 ;; * treemacs
@@ -30,7 +30,8 @@
                    'hl-line-treemacs-face))
             (defun my/treemacs-show-maybe ()
               (when (and (>= (frame-width) 120)
-                         (file-exists-p treemacs-persist-file))
+                         (file-exists-p treemacs-persist-file)
+                         (<= (length (frame-list)) 2))
                 (treemacs-select-window)
                 (other-window 1))))
   :bind (("<f9>" . treemacs-select-window) ; Focus treemacs.