diff --git a/tool/vcs.rb b/tool/vcs.rb
index 34bafa72ac..ecb313d58d 100644
--- a/tool/vcs.rb
+++ b/tool/vcs.rb
@@ -124,7 +124,8 @@ class VCS
     @@dirs << [dir, self, pred]
   end
 
-  def self.detect(path, uplevel_limit: 0)
+  def self.detect(path, options = {})
+    uplevel_limit = options.fetch(:uplevel_limit, 0)
     curr = path
     begin
       @@dirs.each do |dir, klass, pred|