diff --git a/.guix-authorizations b/.guix-authorizations
index 897a36b..b187f3c 100644
--- a/.guix-authorizations
+++ b/.guix-authorizations
@@ -1,3 +1,5 @@
+;; -*- mode: scheme; -*-
+
 ;; This is the list of OpenPGP keys currently authorized to sign commits in
 ;; this repository.