diff --git a/init.el b/init.el
index 8537aba..392ed96 100644
--- a/init.el
+++ b/init.el
@@ -958,31 +958,31 @@ With given ARG, display files in `db/important-document-path’."
 
 ;; Agenda
 
-(defcustom db/org-default-work-file ""
+(defcustom db/org-default-work-file nil
   "Path to default org-mode file at work."
   :group 'personal-settings
   :type 'string
   :set #'db/update-org-agenda-files)
 
-(defcustom db/org-default-home-file ""
+(defcustom db/org-default-home-file nil
   "Path to default org-mode file at home."
   :group 'personal-settings
   :type 'string
   :set #'db/update-org-agenda-files)
 
-(defcustom db/org-default-notes-file ""
+(defcustom db/org-default-notes-file nil
   "Path to default org-mode file for notes."
   :group 'personal-settings
   :type 'string
   :set #'db/update-org-agenda-files)
 
-(defcustom db/org-default-refile-file ""
+(defcustom db/org-default-refile-file nil
   "Path to default org-mode file for capturing."
   :group 'personal-settings
   :type 'string
   :set #'db/update-org-agenda-files)
 
-(defcustom db/org-default-pensieve-file ""
+(defcustom db/org-default-pensieve-file nil
   "Path to default org-mode file for private notes."
   :group 'personal-settings
   :type 'string