diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index dca12216..b9e56a1a 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -90,6 +90,8 @@
 # WAF
 - ^waf$
 
+# .osx
+- ^.osx$
 
 ## Obj-C ##