diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 69d3a869..11ee62a8 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -854,8 +854,14 @@ Objective-C:
   - obj-c
   - objc
   primary_extension: .m
-  extensions:
-  - .mm
+
+Objective-C++:
+  type: programming
+  color: "#4886FC"
+  aliases:
+  - obj-c++
+  - objc++
+  primary_extension: .mm
 
 Objective-J:
   type: programming