diff --git a/init-package/init-rainbow-identifiers.el b/init-package/init-rainbow-identifiers.el
index 988a6d584..5fc5212ea 100644
--- a/init-package/init-rainbow-identifiers.el
+++ b/init-package/init-rainbow-identifiers.el
@@ -1,3 +1,3 @@
 (use-package rainbow-identifiers
   :init
-  (progn (add-hook 'prog-mode-hook 'rainbow-identifiers-mode)))
+  (add-to-hooks 'rainbow-identifiers-mode '(prog-mode-hook erlang-mode-hook)))