diff --git a/elisp/firejail-mode.el b/elisp/firejail-mode.el
index 1aefc6c..3c875bf 100644
--- a/elisp/firejail-mode.el
+++ b/elisp/firejail-mode.el
@@ -124,7 +124,9 @@ dbus-\\(system\\|user\\) +\\(none\\|filter\\)?\\)" . 2))
   "Major mode for editing firejail profiles."
   (add-to-list (make-local-variable 'completion-at-point-functions)
                #'firejail-profile-capf)
-  (setq-local font-lock-defaults '(firejail-profile-font-lock-keywords))
+  (setq-local font-lock-defaults '(firejail-profile-font-lock-keywords)
+              comment-start "#"
+              comment-end "")
   (set-syntax-table firejail-profile-syntax-table))
 
 (add-to-list 'auto-mode-alist