diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index 31ff7ce7..a68f0a81 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -232,9 +232,6 @@
 # .DS_Store's
 - .[Dd][Ss]_[Ss]tore$
 
-# Mercury --use-subdirs
-- Mercury/
-
 # R packages
 - ^vignettes/
 - ^inst/extdata/