information."
`(custom-declare-group (quote ,symbol) ,members ,doc ,@args))
-;; This is preloaded very early, so we avoid using CL features.
-(defvar custom-group-hash-table (make-hashtable 300 'eq)
+(defvar custom-group-hash-table (make-hash-table :size 300 :test 'eq)
"Hash-table of non-empty groups.")
(defun custom-add-to-group (group option widget)