diff --git a/unittest/bind_optional.cpp.in b/unittest/bind_optional.cpp.in
index 5c7c16aa47c0041601497f10964fd5b772f3228d..f71773d6505fa7dd5c76174c8b9ac6db5359ab9e 100644
--- a/unittest/bind_optional.cpp.in
+++ b/unittest/bind_optional.cpp.in
@@ -1,4 +1,7 @@
+///
 /// Copyright (c) 2023 CNRS INRIA
+///
+
 #include "eigenpy/eigenpy.hpp"
 #include "eigenpy/optional.hpp"
 #ifdef EIGENPY_WITH_CXX17_SUPPORT