diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 73fb8aff..adecbca6 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1350,6 +1350,7 @@ XML:
   - .tmPreferences
   - .tmSnippet
   - .tml
+  - .ui
   - .vxml
   - .wsdl
   - .wxi