diff --git a/scalalib/src/mill/scalalib/JavaModule.scala b/scalalib/src/mill/scalalib/JavaModule.scala
index ab4f8795a94..fc01dceb6d6 100644
--- a/scalalib/src/mill/scalalib/JavaModule.scala
+++ b/scalalib/src/mill/scalalib/JavaModule.scala
@@ -135,11 +135,12 @@ trait JavaModule extends mill.Module with TaskModule { outer =>
   def allSources = T{ sources() ++ generatedSources() }
 
   def allSourceFiles = T{
+    def isHiddenFile(path: Path) = path.segments.last.startsWith(".")
     for {
       root <- allSources()
       if exists(root.path)
       path <- (if (root.path.isDir) ls.rec(root.path) else Seq(root.path))
-      if path.isFile && (path.ext == "scala" || path.ext == "java")
+      if path.isFile && ((path.ext == "scala" || path.ext == "java") && !isHiddenFile(path))
     } yield PathRef(path)
   }