diff --git a/README.md b/README.md
index 7d15a20..fc264ec 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ require "scientist"
 class MyWidget
   def allows?(user)
     experiment = Scientist::Default.new "widget-permissions"
-    experiment.use { model.check_user?(user).valid? } # old way
+    experiment.use { model.check_user(user).valid? } # old way
     experiment.try { user.can?(:read, model) } # new way
 
     experiment.run