diff --git a/.config/nyxt/init.lisp b/.config/nyxt/init.lisp
index 32b3af93..dd88c5ab 100644
--- a/.config/nyxt/init.lisp
+++ b/.config/nyxt/init.lisp
@@ -284,10 +284,11 @@ format."
 
 (load-after-system :slynk (nyxt-init-file "slynk.lisp"))
 
-(defvar +dev-data-profile+ (make-instance 'data-profile :name "dev")
-  "Development profile.")
+(define-class dev-data-profile (data-profile)
+  ((name :initform "dev"))
+  (:documentation "Development profile."))
 
-(defmethod nyxt:expand-data-path ((profile (eql +dev-data-profile+)) (path data-path))
+(defmethod nyxt:expand-data-path ((profile dev-data-profile) (path data-path))
   "Persist data to /tmp/nyxt/."
   (expand-default-path (make-instance (class-name (class-of path))
                                       :basename (basename path)