diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 62a9e651..e54f77c5 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1341,13 +1341,17 @@ XML:
   - wsdl
   primary_extension: .xml
   extensions:
+  - .ccxml
   - .glade
+  - .grxml
   - .kml
   - .mxml
   - .plist
   - .rdf
   - .rss
+  - .scxml
   - .svg
+  - .vxml
   - .wsdl
   - .wxi
   - .wxl