diff --git a/lib/openid/extensions/ui.rb b/lib/openid/extensions/ui.rb
index f0db5dca..6c156d7f 100644
--- a/lib/openid/extensions/ui.rb
+++ b/lib/openid/extensions/ui.rb
@@ -39,7 +39,7 @@ def self.from_openid_request(oid_req)
         return oauth_req
       end
 
-      # Set UI extention parameters
+      # Set UI extension parameters
       def parse_extension_args(args)
         @lang = args["lang"]
         @icon = args["icon"]