diff --git a/refresh.template.py b/refresh.template.py
index 194f365..e34ddec 100644
--- a/refresh.template.py
+++ b/refresh.template.py
@@ -691,8 +691,8 @@ def _get_files(compile_action):
 _get_files.has_logged_missing_file_error = False
 # Setup extensions and flags for the whole C-language family.
 # Clang has a list: https://github.com/llvm/llvm-project/blob/b9f3b7f89a4cb4cf541b7116d9389c73690f78fa/clang/lib/Driver/Types.cpp#L293
-_get_files.c_source_extensions = ('.c', '.i')
-_get_files.cpp_source_extensions = ('.cc', '.cpp', '.cxx', '.c++', '.C', '.CC', '.cp', '.CPP', '.C++', '.CXX', '.ii')
+_get_files.c_source_extensions = ('.c', '.i', '.h')
+_get_files.cpp_source_extensions = ('.cc', '.cpp', '.cxx', '.c++', '.C', '.CC', '.cp', '.CPP', '.C++', '.CXX', '.ii', '.hpp')
 _get_files.objc_source_extensions = ('.m',)
 _get_files.objcpp_source_extensions = ('.mm', '.M')
 _get_files.cuda_source_extensions = ('.cu', '.cui')