diff --git a/collects/setup/option-sig.ss b/collects/setup/option-sig.ss
index b7905a046e..3d4b1c9d67 100644
--- a/collects/setup/option-sig.ss
+++ b/collects/setup/option-sig.ss
@@ -15,4 +15,5 @@
      call-install
      pause-on-errors
      specific-collections
-     archives)))
+     archives
+     current-target-directory-getter)))