diff --git a/ale_linters/scala/metals.vim b/ale_linters/scala/metals.vim
index 1362e1a3..363aa990 100644
--- a/ale_linters/scala/metals.vim
+++ b/ale_linters/scala/metals.vim
@@ -13,6 +13,7 @@ function! ale_linters#scala#metals#GetProjectRoot(buffer) abort
 
     let l:potential_roots = [
     \   'build.sc',
+    \   'build.mill',
     \   'build.sbt',
     \   '.bloop',
     \   '.metals',
diff --git a/doc/ale-scala.txt b/doc/ale-scala.txt
index 4c188880..5a4ea793 100644
--- a/doc/ale-scala.txt
+++ b/doc/ale-scala.txt
@@ -33,8 +33,8 @@ g:ale_scala_metals_project_root
   Default: `''`
 
   By default the project root is found by searching upwards for `build.sbt`,
-  `build.sc`, `.bloop` or `.metals`. If the project root is elsewhere, you
-  can override the project root directory.
+  `build.sc`, `build.mill`, `.bloop` or `.metals`. If the project root is elsewhere, 
+	you can override the project root directory.
 
 
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