diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index 4b8299f4..0728264e 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -42,6 +42,7 @@
 
 # Bootstrap css and js
 - (^|/)bootstrap([^.]*)\.(js|css)$
+- (^|/)custom\.bootstrap([^\s]*)(js|css|less|scss|)$
 
 # Font Awesome
 - font-awesome.css