diff --git a/lisp/lib/docs.el b/lisp/lib/docs.el
index b30a3072a..8fb7975fa 100644
--- a/lisp/lib/docs.el
+++ b/lisp/lib/docs.el
@@ -13,7 +13,7 @@
 ;;; Code:
 
 ;;;###autoload
-(defvar doom-docs-dir (concat doom-emacs-dir "docs/")
+(defvar doom-docs-dir (file-name-concat doom-emacs-dir "docs/")
   "Where Doom's documentation files are stored. Must end with a slash.")
 
 ;; DEPRECATED Will be renamed once docs "framework" is generalized