diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index e0bde437..c190c3e4 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -133,6 +133,7 @@ C:
   extensions:
   - .c
   - .h
+  - .w
 
 C#:
   type: programming