diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 12554bee..d1598190 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1187,8 +1187,8 @@ Objective-C:
   - objc
   primary_extension: .m
   extensions:
-  - .mm
   - .h
+  - .mm
 
 Objective-J:
   type: programming