diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index c2ff4393..33aa5cae 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -781,8 +781,6 @@ Moocode:
 MoonScript:
   type: programming
   primary_extension: .moon
-  extensions:
-  - .moon
 
 Myghty:
   primary_extension: .myt