1 files changed, 6 insertions, 3 deletions
diff --git a/src/libutil/callback.hh b/src/libutil/callback.hh
index ef31794be..3710d1239 100644
--- a/src/libutil/callback.hh
+++ b/src/libutil/callback.hh
@@ -1,13 +1,16 @@
 #pragma once
+///@file
 
 #include <future>
 #include <functional>
 
 namespace nix {
 
-/* A callback is a wrapper around a lambda that accepts a valid of
-   type T or an exception. (We abuse std::future<T> to pass the value or
-   exception.) */
+/**
+ * A callback is a wrapper around a lambda that accepts a valid of
+ * type T or an exception. (We abuse std::future<T> to pass the value or
+ * exception.)
+ */
 template<typename T>
 class Callback
 {