diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 9daa5912..1e296718 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1063,7 +1063,9 @@ Mask:
 Matlab:
   type: programming
   color: "#bb92ac"
-  primary_extension: .m
+  primary_extension: .matlab
+  extensions:
+  - .m
 
 Max:
   type: programming