diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index af4ee85a..5144475e 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -583,6 +583,7 @@ Makefile:
 
 Mako:
   extensions:
+  - .mako
   - .mao
 
 Markdown: