diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 9bd6450d..2b4c355c 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -254,6 +254,7 @@ C++:
   extensions:
   - .C
   - .c++
+  - .cc
   - .cxx
   - .H
   - .h++