diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 1e0df216..1fcb25c6 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -128,6 +128,7 @@ C:
   extensions:
   - .c
   - .h
+  - .w
 
 C#:
   type: programming