diff --git a/evil-collection-lua-mode.el b/evil-collection-lua-mode.el
index 27b012f..5fe2aae 100644
--- a/evil-collection-lua-mode.el
+++ b/evil-collection-lua-mode.el
@@ -30,6 +30,8 @@
 (require 'evil)
 (require 'lua-mode nil t)
 
+(defvar lua-indent-level)
+
 (defun evil-collection-lua-mode-set-evil-shift-width ()
   "Set `evil-shift-width' according to `lua-indent-level'."
   (setq evil-shift-width lua-indent-level))