diff --git a/init.d/basics/buffers.el b/init.d/basics/buffers.el
index f462c3e..5e74f95 100644
--- a/init.d/basics/buffers.el
+++ b/init.d/basics/buffers.el
@@ -1,6 +1,6 @@
 ;;; buffers.el --- Default settings for buffers. -*- lexical-binding: t; -*-
 
-;; Time-stamp: <2020-03-18T14:54:44+0100>
+;; Time-stamp: <2020-03-18T15:35:10+0100>
 
 ;;; Commentary:
 ;; * Setup scratch buffer.
@@ -69,6 +69,7 @@
 ;; Dedicate windows to “purposes”.
 (use-package window-purpose
   ;; :pin melpa  ; We need > 1.7 <https://github.com/bmag/emacs-purpose/issues/158>
+  :demand t                             ; projectile depends on window-purpose.
   :config (progn
             (purpose-mode)
             (add-to-list 'purpose-user-mode-purposes '(c++-mode . cpp))