diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index d93a8a89..541272b0 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -49,6 +49,7 @@
 
 # Vendored dependencies
 - third[-_]?party/
+- 3rd[-_]?party/
 - vendors?/
 - extern(al)?/