diff --git a/init.d/basics/buffers.el b/init.d/basics/buffers.el
index 7447146..698e64e 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: <2020-11-29T10:53:18+0100>
+;; Time-stamp: <2020-11-30T21:47:33+0100>
 
 ;;; Commentary:
 ;; * Setup scratch buffer.
@@ -81,6 +81,7 @@
 (use-package window-purpose
   :demand t                             ; projectile depends on window-purpose.
   :diminish purpose-mode
+  :defines (purpose-x-popwin-major-modes)
   :custom (purpose-x-popwin-position 'right)
   :config (progn
             (purpose-mode)