diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 1fbc38b6..46cb9ff2 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1252,13 +1252,17 @@ XML:
   ace_mode: xml
   primary_extension: .xml
   extensions:
+  - .ccxml
   - .glade
+  - .grxml
   - .kml
   - .mxml
   - .plist
   - .rdf
   - .rss
+  - .scxml
   - .svg
+  - .vxml
   - .wsdl
   - .wxi
   - .wxl