diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 01f4b4cd..9daa5912 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1063,7 +1063,7 @@ Mask:
 Matlab:
   type: programming
   color: "#bb92ac"
-  primary_extension: .matlab
+  primary_extension: .m
 
 Max:
   type: programming