diff --git a/cmake/nanobind.cmake b/cmake/nanobind.cmake
index 42632a0..5780055 100644
--- a/cmake/nanobind.cmake
+++ b/cmake/nanobind.cmake
@@ -1,3 +1,5 @@
+# pycxx/cmake/nanobind.cmake
+
 include(FetchContent)
 FetchContent_Declare(
   nanobind
diff --git a/cmake/pybind11.cmake b/cmake/pybind11.cmake
index 7e96af7..1a5ec54 100644
--- a/cmake/pybind11.cmake
+++ b/cmake/pybind11.cmake
@@ -1,3 +1,5 @@
+# pycxx/cmake/pybind11.cmake
+
 include(FetchContent)
 FetchContent_Declare(
   pybind11