diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 9bde77235a..0ca61df403 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -6622,6 +6622,7 @@ Scala:
   - ".kojo"
   - ".sbt"
   - ".sc"
+  - ".mill"
   interpreters:
   - scala
   language_id: 341