diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 185ba4a1..58fcc76a 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -115,6 +115,7 @@ Batchfile:
   aliases:
   - bat
   primary_extension: .bat
+  extensions:
   - .cmd
 
 Befunge: