diff --git a/lisp/auth-source.el b/lisp/auth-source.el
index 946debca95e..45f2a488dd5 100644
--- a/lisp/auth-source.el
+++ b/lisp/auth-source.el
@@ -2395,21 +2395,21 @@ See `auth-source-search' for details on SPEC."
   :version "28.1")
 
 (defvar authinfo--keywords
-  '(("^#.*" . font-lock-comment-face)
+  '(("^#.*" (0 'font-lock-comment-face))
     ("^\\(machine\\)[ \t]+\\([^ \t\n]+\\)"
-     (1 font-lock-variable-name-face)
-     (2 font-lock-builtin-face))
+     (1 'font-lock-variable-name-face)
+     (2 'font-lock-builtin-face))
     ("\\(login\\)[ \t]+\\([^ \t\n]+\\)"
-     (1 font-lock-comment-delimiter-face)
-     (2 font-lock-keyword-face))
+     (1 'font-lock-comment-delimiter-face)
+     (2 'font-lock-keyword-face))
     ("\\(password\\)[ \t]+\\([^ \t\n]+\\)"
-     (1 font-lock-comment-delimiter-face)
-     (2 font-lock-doc-face))
+     (1 'font-lock-comment-delimiter-face)
+     (2 'font-lock-doc-face))
     ("\\(port\\)[ \t]+\\([^ \t\n]+\\)"
-     (1 font-lock-comment-delimiter-face)
-     (2 font-lock-type-face))
+     (1 'font-lock-comment-delimiter-face)
+     (2 'font-lock-type-face))
     ("\\([^ \t\n]+\\)[, \t]+\\([^ \t\n]+\\)"
-     (1 font-lock-constant-face)
+     (1 'font-lock-constant-face)
      (2 nil))))
 
 ;;;###autoload