diff --git a/init.d/basics/ui.el b/init.d/basics/ui.el
index 289907e..8fd4605 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: <2020-08-03T03:13:27+0200>
+;; Time-stamp: <2020-11-13T14:41:37+0100>
 
 ;;; Commentary:
 ;; * treemacs
@@ -15,6 +15,9 @@
 (use-package treemacs
   :demand t
   :after (display-line-numbers)
+  ;; Start with a clean workspace list.
+  :init (delete-file (expand-file-name ".cache/treemacs-persist"
+                                       user-emacs-directory))
   :custom ((treemacs-project-follow-cleanup t) ; Collapse projects when leaving.
            (treemacs-silent-refresh t))        ; No log message on refresh.
   :config (progn