diff --git a/apheleia.el b/apheleia.el
index 0d080f8..0d1b442 100644
--- a/apheleia.el
+++ b/apheleia.el
@@ -7,6 +7,7 @@
 ;; Homepage: https://github.com/raxod502/apheleia
 ;; Keywords: tools
 ;; Package-Requires: ((emacs "25.2"))
+;; SPDX-License-Identifier: MIT
 ;; Version: 1.1
 
 ;;; Commentary: