diff --git a/isar-mode.el b/isar-mode.el
index f00cfb2..e0f2f8a 100644
--- a/isar-mode.el
+++ b/isar-mode.el
@@ -413,6 +413,10 @@
   (setq major-mode 'isar-mode)
   (setq isar-name "isar")
   (setq mode-name "Isar")
+  (setq-local comment-start "(* ")
+  (setq-local comment-end " *)")
+  (setq-local comment-start-skip "(\\*+[ \t]*")
+  (setq-local comment-style 'multi-line)
   (unicode-tokens-mode 1)
   (run-hooks 'isar-mode-hook))
 
@@ -421,4 +425,4 @@
 
 (provide 'isar-mode)
 
-;;; isar-mode.el ends here
\ No newline at end of file
+;;; isar-mode.el ends here