diff --git a/plugin.rb b/plugin.rb
index dab2f85..88fdfbd 100644
--- a/plugin.rb
+++ b/plugin.rb
@@ -73,7 +73,7 @@ def fail_auth(reason)
   end
   def load_user_descriptions
     file_path = "#{File.expand_path(File.dirname(__FILE__))}/ldap_users.yml"
-    return nil unless File.exists?(file_path)
+    return nil unless File.exist?(file_path)
     return YAML.load_file(file_path)
   end
 end