diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 6da65797..f48d21c4 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -278,6 +278,7 @@ C:
   - .C
   - .H
   - .cats
+  - .h
   - .w
 
 C#:
@@ -304,6 +305,7 @@ C++:
   - .c++
   - .cc
   - .cxx
+  - .h
   - .h++
   - .hh
   - .hpp