diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 0558ecdc..1005fba9 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1656,6 +1656,7 @@ JavaScript:
   - .gs
   - .jake
   - .jsb
+  - .jscad
   - .jsfl
   - .jsm
   - .jss